Special Conditions: TTF Aerospace, LLC, Airbus Model A330-300 and Model A330-900 Series Airplanes; Bulk Cargo Lower Deck Crew Rest Compartments, 26593-26598 [2019-11957]

Download as PDF 26593 Proposed Rules Federal Register Vol. 84, No. 110 Friday, June 7, 2019 This section of the FEDERAL REGISTER contains notices to the public of the proposed issuance of rules and regulations. The purpose of these notices is to give interested persons an opportunity to participate in the rule making prior to the adoption of the final rules. DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 25 [Docket No. FAA–FAA–2019–0427; Notice No. 25–19–07–SC] Special Conditions: TTF Aerospace, LLC, Airbus Model A330–300 and Model A330–900 Series Airplanes; Bulk Cargo Lower Deck Crew Rest Compartments Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed special conditions. AGENCY: This action proposes special conditions for the Airbus Model A330– 300 and Model A330–900 series airplanes. These airplanes, as modified by TTF Aerospace, LLC (TTF Aerospace), will have a novel or unusual design feature when compared to the state of technology envisioned in the airworthiness standards for transport category airplanes. This design feature is a lower deck mobile crew rest (LD–MCR) installed in the aft cargo compartment of Model A330–300 and Model A330–900 series airplanes. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. These proposed special conditions contain the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards. DATES: Send comments on or before June 27, 2019. ADDRESSES: Send comments identified by Docket No. FAA–2019–0427 using any of the following methods: • Federal eRegulations Portal: Go to https://www.regulations.gov/ and follow the online instructions for sending your comments electronically. • Mail: Send comments to Docket Operations, M–30, U.S. Department of Transportation (DOT), 1200 New Jersey jbell on DSK3GLQ082PROD with PROPOSALS SUMMARY: VerDate Sep<11>2014 16:40 Jun 06, 2019 Jkt 247001 Avenue SE, Room W12–140, West Building Ground Floor, Washington, DC 20590–0001. • Hand Delivery or Courier: Take comments to Docket Operations in Room W12–140 of the West Building Ground Floor at 1200 New Jersey Avenue SE, Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. • Fax: Fax comments to Docket Operations at 202–493–2251. Privacy: The FAA will post all comments it receives, without change, to https://www.regulations.gov/, including any personal information the commenter provides. Using the search function of the docket website, anyone can find and read the electronic form of all comments received into any FAA docket, including the name of the individual sending the comment (or signing the comment for an association, business, labor union, etc.). DOT’s complete Privacy Act Statement can be found in the Federal Register published on April 11, 2000 (65 FR 19477–19478). Docket: Background documents or comments received may be read at https://www.regulations.gov/ at any time. Follow the online instructions for accessing the docket or go to Docket Operations in Room W12–140 of the West Building Ground Floor at 1200 New Jersey Avenue SE, Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. FOR FURTHER INFORMATION CONTACT: Alan Sinclair, Airframe & Cabin Safety Section, AIR–675, Transport Standards Branch, Policy and Innovation Division, Aircraft Certification Service, Federal Aviation Administration, 2200 South 216th Street, Des Moines, Washington 98198; telephone and fax 206 231 3215; email alan.sinclair@faa.gov. SUPPLEMENTARY INFORMATION: Comments Invited We invite interested people to take part in this rulemaking by sending written comments, data, or views. The most helpful comments reference a specific portion of the special conditions, explain the reason for any recommended change, and include supporting data. We will consider all comments we receive by the closing date for comments. We may change these special conditions based on the comments we receive. PO 00000 Frm 00001 Fmt 4702 Sfmt 4702 Background On February 20, 2019, TTF Aerospace applied for a supplemental type certificate for a LD–MCR installed in the aft cargo compartment of Airbus Model A330–300 and Model A330–900 series airplanes. The Airbus Model A330–300 and Model A330–900 series airplanes are twin-engine, transport category airplanes with maximum takeoff weights of 405,650 and 533,518 pounds, respectively, and seating for 440 passengers. The LD–MCR compartment will be located under the passenger cabin floor in the aft cargo compartment of Airbus Model A330–300 and Model A330–900 airplanes. It will be removable from the cargo compartment. The LD–MCR compartment will be occupied in flight but not during taxi, takeoff, or landing. No more than ten crewmembers at a time will be permitted to occupy it. The LD–MCR compartment will have a smoke detection system, a fire suppression system, and an oxygen system. The LD–MCR compartment will be accessed from the main deck via a ‘‘stairhouse.’’ The floor within the stairhouse has a hatch that leads to stairs that occupants use to descend into the LD–MCR compartment. An interface will keep this hatch open when the stairhouse door is open. In addition, there will be an emergency hatch that opens directly into the main passenger cabin. The LD–MCR compartment has a maintenance door. This door is intended to be used to allow maintenance personnel and cargo handlers to enter the LD–MCR from the cargo compartment when the airplane is not in flight. Type Certification Basis Under the provisions of title 14, Code of Federal Regulations (14 CFR) 21.101, TTF Aerospace must show that the Airbus Model A330–300 and Model A330–900 series airplanes, as changed, continue to meet the applicable provisions of the regulations listed in Type Certificate No. A46NM or the applicable regulations in effect on the date of application for the change, except for earlier amendments as agreed upon by the FAA. If the Administrator finds that the applicable airworthiness regulations (i.e., 14 CFR part 25) do not contain adequate or appropriate safety standards E:\FR\FM\07JNP1.SGM 07JNP1 26594 Federal Register / Vol. 84, No. 110 / Friday, June 7, 2019 / Proposed Rules for the Airbus Model A330–300 and Model A330–900 series airplanes because of a novel or unusual design feature, special conditions are prescribed under the provisions of § 21.16. Special conditions are initially applicable to the model for which they are issued. Should the applicant apply for a supplemental type certificate to modify any other model included on the same type certificate to incorporate the same novel or unusual design feature, these special conditions would also apply to the other model under § 21.101. In addition to the applicable airworthiness regulations and special conditions, the Airbus Model A330–300 and Model A330–900 series airplanes must comply with the fuel vent and exhaust emission requirements of 14 CFR part 34 and the noise certification requirements of 14 CFR part 36. The FAA issues special conditions, as defined in 14 CFR 11.19, in accordance with § 11.38, and they become part of the type certification basis under § 21.101. jbell on DSK3GLQ082PROD with PROPOSALS Novel or Unusual Design Features The Airbus Model A330–300 and Model A330–900 series airplanes will incorporate the following novel or unusual design features: This design feature is a LD–MCR installed in the aft cargo compartment of Model A330–300 and Model A330–900 series airplanes. Discussion While the installation of the crew rest compartment is not a new concept for large transport category airplanes, each crew rest compartment has unique features based on design, location, and use on the airplane. The LD–MCR compartment is novel in terms of part 25 of title 14 of the CFR in that it will be located under the passenger cabin floor in the aft cargo compartment of Airbus Model A330–300 and Model A330–900 series airplanes, which is not contemplated by § 25.819 regarding lower deck service compartments (including galleys). Due to the novel or unusual features associated with the installation of a LD–MCR compartment, special conditions are considered necessary to provide a level of safety equal to that established by the airworthiness regulations incorporated by reference in the type certificates of these airplanes as applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. Most of these special conditions come from § 25.819 but they require more stringent standards for fire protection VerDate Sep<11>2014 16:40 Jun 06, 2019 Jkt 247001 and emergency egress, because of design features and location of the LD–MCR. The applicant should note that the FAA considers smoke or fire detection and fire suppression systems (including airflow management features that prevent hazardous quantities of smoke or fire extinguishing agent from entering any other compartment occupied by crewmembers or passengers) for crew rest compartments complex in terms of paragraph 6d of Advisory Circular (AC) 25.1309–1A, ‘‘System Design and Analysis,’’ dated June 21, 1988. In addition, the FAA considers failure of the crew rest compartment fire protection system (i.e., smoke or fire detection and fire suppression systems) in conjunction with a crew rest fire to be a catastrophic event. Based on the ‘‘Depth of Analysis Flowchart’’ shown in Figure 2 of AC 25.1309–1A, the depth of analysis should include both qualitative and quantitative assessments. Refer to paragraphs 8d, 9, and 10 of AC 25.1309–1A. In addition, it should be noted that flammable fluids, explosives, or other dangerous cargo are prohibited from being carried in the crew rest areas. The requirements to enable crewmembers’ quick entry to the crew rest compartment and to locate a fire source inherently places limits on the amount of baggage that may be carried and the size of the crew rest area. The FAA considers that the crew rest area must be limited to the stowage of crew personal luggage and must not be used for the stowage of cargo or passenger baggage. The design of such a system to include cargo or passenger baggage would require additional requirements to ensure safe operation. Furthermore, the addition of galley equipment or a kitchenette incorporating a heat source (e.g., cook tops, microwaves, coffee pots, etc.), other than a conventional lavatory or kitchenette hot water heater, within the LD–MCR compartment defined in the ‘‘Novel or Unusual Design Features’’ section, may require additional special conditions to be considered. A hot water heater is acceptable without further special conditions consideration. Finally, amendment 25–38 modified the requirements of § 25.1439(a) by adding, ‘‘In addition, protective breathing equipment must be installed in each isolated separate compartment in the airplane, including upper and lower lobe galleys, in which crewmember occupancy is permitted during flight for the maximum number of crewmembers expected to be in the area during any operation.’’ The LD– MCR compartment is an isolated separate compartment, so § 25.1439(a) is PO 00000 Frm 00002 Fmt 4702 Sfmt 4702 applicable. However, the § 25.1439(a) protective breathing equipment (PBE) requirements for isolated separate compartments are not appropriate because the LD–MCR is novel or unusual in terms of the number of occupants. In 1976, when amendment 25–38 was adopted, small galleys were the only isolated compartments that had been certificated. Two crewmembers were the maximum expected to occupy those galleys. This crew rest compartment can accommodate up to ten crewmembers. This large number of occupants in an isolated compartment was not envisioned at the time amendment 25– 38 was adopted. It is not appropriate for all occupants to don PBEs in the event of a fire because the first action should be to leave the confined space unless the occupant is fighting the fire. Taking the time to don the PBE would prolong the time for the emergency evacuation of the occupants and possibly interfere with efforts to extinguish the fire. These special conditions therefore provide procedures that establish a level of safety equivalent to the PBE requirements. Operational Evaluations and Approval These special conditions outline requirements for flightcrew and cabin crew rest compartment design approvals (e.g., type design change or supplemental type certificate) administered by the FAA’s Aircraft Certification Service. Prior to operational use of a flight (cabin) crew rest compartment, the FAA’s Flight Standards Service must evaluate for operational suitability the flight (cabin) crew sleeping quarters and rest facilities. Refer to §§ 91.1061(b)(1), 121.485(a), 121.523(b), and 135.269(b)(5). Compliance with these special conditions does not ensure that the applicant has demonstrated compliance with the requirements of 14 CFR parts 91, 121, or 135. To obtain an operational evaluation, the type design holder must contact the appropriate Aircraft Evaluation Group (AEG) in the Flight Standards Service and request an evaluation for operational suitability of the flightcrew sleeping quarters in their crew rest facility. Results of these evaluations should be documented and appended to the applicable Flight Standardization Board (FSB) Report. Individual operators may reference these standardized evaluations in discussions with their FAA Principal Operating Inspector (POI) as the basis for an E:\FR\FM\07JNP1.SGM 07JNP1 Federal Register / Vol. 84, No. 110 / Friday, June 7, 2019 / Proposed Rules jbell on DSK3GLQ082PROD with PROPOSALS operational approval, in lieu of an onsite operational evaluation. Any changes to the approved flight (cabin) crew rest compartment configuration that affect crewmember emergency egress or any other procedures affecting the safety of the occupying crewmembers and/or related training shall require a re-evaluation and approval. In the event of any design change that affects egress, safety procedures, or training, the applicant is responsible for notifying the FAA’s AEG that a new crew rest facility evaluation is required. All instructions for continued airworthiness (ICAs) will be submitted to the Seattle AEG for approval acceptance, including service bulletins, before issuance of the FAA modification approval. These proposed special conditions are the same as Special Condition 25–281– SC, except the maximum occupancy is ten rather than seven occupants and a change to the table in Special Condition 20. The proposed conditions provide an appropriate level of safety for the proposed occupancy limit as only the size of the compartment will increase to accommodate the additional occupants but all other requirements for safety, fire suppression, and emergency evacuation will remain the same. In addition, the change to the table in Special Condition 20 is related to the location of the crew rest and specifics of the crew rest design. Stowage compartments located in the vicinity of critical equipment or located in an overhead area would typically be listed as conditional. However, this LD–MCR is located in the Class C cargo compartment with all of its features that provide fire protection (e.g., the use of liner material that meets appendix F to part 25, part III; control of ventilation; active fire suppression; active fire detection; etc.). These features remain when the crew rest is installed. The proposed special conditions contain the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards. Applicability As discussed above, these special conditions are applicable to the Airbus Model A330–300 and Model A330–900 airplanes. Should TTF Aerospace apply at a later date for a supplemental type certificate to modify any other model included on Type Certificate No. A46NM to incorporate the same novel or unusual design feature, these special conditions would apply to that model as well. VerDate Sep<11>2014 16:40 Jun 06, 2019 Jkt 247001 Certification of the Airbus Model A330–300 and Model A330–900 airplanes with the LD–MCR is currently scheduled for June 2019. The substance of these special conditions has been subject to the notice and public comment procedure in several prior instances. Therefore, because a delay would significantly affect the applicant’s installation of the system and the certification of the airplane, we are shortening the public comment period to 20 days. Conclusion This action affects only a certain novel or unusual design feature on Airbus Model A330–300 and Model A330–900 of airplanes. It is not a rule of general applicability and affects only the applicant who applied to the FAA for approval of these features on the airplane. List of Subjects in 14 CFR Part 25 Aircraft, Aviation safety, Reporting and recordkeeping requirements. Authority Citation The authority citation for these special conditions is as follows: Authority: 49 U.S.C. 106(f), 106(g), 40113, 44701, 44702, 44704. The Proposed Special Conditions Accordingly, the Federal Aviation Administration (FAA) proposes the following special conditions as part of the type certification basis for Airbus Model A330–300 and Model A330–900 airplanes, as modified by TTF Aerospace. 1. Occupancy of the LD–MCR compartment is limited to the total number of installed bunks and seats in each compartment. For each occupant permitted in the LD–MCR compartment, there must be an approved seat or berth able to withstand the maximum flight loads when occupied. The maximum occupancy in the LD–MCR compartment is ten. a. There must be appropriate placards displayed in a conspicuous place at each entrance to the LD–MCR compartment indicating the following information: (1) The maximum number of occupants allowed; (2) That occupancy is restricted to crewmembers trained in the evacuation procedures for the LD–MCR compartment; (3) That occupancy is prohibited during taxi, takeoff and landing; (4) That smoking is prohibited in the LD–MCR compartment; and (5) That the LD–MCR compartment is limited to the stowage of personal PO 00000 Frm 00003 Fmt 4702 Sfmt 4702 26595 luggage of crewmembers and must not be used for the stowage of cargo or passenger baggage. b. There must be at least one ashtray located conspicuously on or near the entry side of any entrance to the LD– MCR compartment. c. There must be a means to prevent passengers from entering the LD–MCR compartment in an emergency or when no flight attendant is present. d. There must be a means for any door installed between the LD–MCR compartment and the passenger cabin to be capable of being quickly opened from inside the LD–MCR compartment, even when crowding occurs at each side of the door. e. For all doors installed in the evacuation routes, there must be a means to preclude anyone from being trapped inside a compartment. If a locking mechanism is installed, it must be capable of being unlocked from the outside without the aid of special tools. The lock must not prevent opening from the inside of a compartment at any time. 2. There must be at least two emergency evacuation routes, which could be used by each occupant of the LD–MCR compartment to rapidly evacuate to the main cabin and could be closed from the main passenger cabin after evacuation. a. The routes must be located with one at each end of the LD–MCR compartment or with two having sufficient separation within the LD– MCR compartment and between the routes to minimize the possibility of an event (either inside or outside of the LD–MCR compartment) rendering both routes inoperative. b. The routes must be designed to minimize the possibility of blockage, which might result from fire, mechanical or structural failure, or from persons standing on top of or against the escape route. If an evacuation route utilizes an area where normal movement of passengers occurs, it must be demonstrated that passengers would not impede egress to the main deck. If a hatch is installed in an evacuation route, the point at which the evacuation route terminates in the passenger cabin should not be located where normal movement by passengers or crew occur, such as in a main aisle, cross aisle, passageway or galley complex. If such a location cannot be avoided, special consideration must be taken to ensure that the hatch or door can be opened when a person who is the weight of a ninety-fifth percentile male is standing on the hatch or door. The use of evacuation routes must not be dependent on any powered device. If there is low headroom at or near an E:\FR\FM\07JNP1.SGM 07JNP1 jbell on DSK3GLQ082PROD with PROPOSALS 26596 Federal Register / Vol. 84, No. 110 / Friday, June 7, 2019 / Proposed Rules evacuation route, provision must be made to prevent or to protect occupants of the LD–MCR compartment from head injury. c. Emergency evacuation procedures, including the emergency evacuation of an incapacitated crewmember from the LD–MCR compartment, must be established. All of these procedures must be transmitted to the operator for incorporation into its training programs and appropriate operational manuals. d. There must be a limitation in the Airplane Flight Manual or other suitable means requiring that crewmembers be trained in the use of evacuation routes. 3. There must be a means for the evacuation of an incapacitated crewmember who is representative of a 95th percentile male from the LD–MCR compartment to the passenger cabin floor. The evacuation must be demonstrated for all evacuation routes. A flight attendant or other crewmember (a total of one assistant within the LD– MCR compartment) may provide assistance in the evacuation. Additional assistance may be provided by up to three persons in the main passenger compartment. For evacuation routes having stairways, the additional assistants may descend down to one half the elevation change from the main deck to the LD–MCR compartment or to the first landing, whichever is higher. 4. The following signs and placards must be provided in the LD–MCR compartment: a. At least one exit sign that meets the requirements of § 25.812(b)(1)(i) at amendment 25–58 must be located near each exit. However, a sign with reduced background area of no less than 5.3 square inches (excluding the letters) may be utilized, provided that it is installed such that the material surrounding the exit sign is light in color (e.g., white, cream, light beige). If the material surrounding the exit sign is not light in color, a sign with a minimum of a one-inch wide background border around the letters would also be acceptable; b. An appropriate placard that defines the location and the operating instructions for each evacuation route must be located near each exit; c. Placards must be readable from a distance of 30 inches under emergency lighting conditions; and d. The exit handles and the placards with the evacuation path operating instructions must be illuminated to at least 160 microlamberts under emergency lighting conditions. 5. There must be a means for emergency illumination to be automatically provided for the LD–MCR compartment in the event of failure of VerDate Sep<11>2014 16:40 Jun 06, 2019 Jkt 247001 the main power system of the airplane or of the normal lighting system of the LD–MCR compartment. a. This emergency illumination must be independent of the main lighting system. b. The sources of general cabin illumination may be common to both the emergency and the main lighting systems, if the power supply to the emergency lighting system is independent of the power supply to the main lighting system. c. The illumination level must be sufficient for the occupants of the LD– MCR compartment to locate and transfer to the main passenger cabin floor by means of each evacuation route. d. The illumination level must be sufficient to locate a deployed oxygen mask with the privacy curtains in the closed position for each occupant of the LD–MCR compartment. 6. There must be means for two-way voice communications between crewmembers on the flightdeck and crewmembers in the LD–MCR compartment. Section 25.785(h) at amendment 25–51 requires flight attendant seats near required floor level emergency exits. Each such exit seat on the aircraft must have a public address system microphone that allows two-way voice communications between flight attendants and crewmembers in the LD– MCR compartment. One microphone may serve more than one such exit seat, provided the proximity of the exits allows unassisted verbal communications between seated flight attendants. 7. There must be a means for manual activation of an aural emergency alarm system, audible during normal and emergency conditions, to enable crewmembers on the flightdeck and at each pair of required floor-level emergency exits to alert crewmembers in the LD–MCR compartment of an emergency. Use of a public address or crew interphone system will be acceptable, provided an adequate means of differentiating between normal and emergency communications is incorporated. The system must be powered in flight for at least ten minutes after the shutdown or failure of all engines and auxiliary power units (APU) or the disconnection or failure of all power sources that are dependent on the continued operation of the engines and APUs. 8. There must be a means, readily detectable by seated or standing occupants of the LD–MCR compartment, which indicates when seat belts should be fastened. If there are no seats, at least one means, such as sufficient handholds, must be provided to cover PO 00000 Frm 00004 Fmt 4702 Sfmt 4702 anticipated turbulence. Seat belt-type restraints must be provided for berths and must be compatible with the sleeping attitude during cruise conditions. There must be a placard on each berth indicating that seat belts must be fastened when the berth is occupied. If compliance with any of the other requirements of these special conditions is predicated on specific head location, there must be a placard specifying the head position. 9. To provide a level of safety equivalent to that provided to occupants of a small isolated galley, in lieu of the requirements of § 25.1439(a) at amendment 25–38 that pertain to isolated compartments, the following equipment must be provided in the LD– MCR compartment: a. At least one approved hand-held fire extinguisher appropriate for the kinds of fires likely to occur; b. Two portable Protective Breathing Equipment (PBE) units approved to Technical Standard Order (TSO)-C116 or equivalent, which are suitable for fire-fighting, or one PBE for each handheld fire extinguisher, whichever is greater; and c. One flashlight. Note: Additional PBEs and fire extinguishers in specific locations, beyond the minimum numbers prescribed in Special Condition No. 9, may be required as a result of any egress analysis accomplished to satisfy Special Condition No. 2(a). 10. A smoke or fire detection system or systems must be provided to monitor each occupiable area within the LD– MCR compartment, including those areas partitioned by curtains. Flight tests must be conducted to show compliance with this requirement. Each smoke or fire detection system must provide the following: a. A visual indication to the flightdeck within one minute after the start of a fire; b. An aural warning in the LD–MCR compartment; and c. A warning in the main passenger cabin. This warning must be readily detectable by a flight attendant, taking into consideration the positioning of flight attendants throughout the mainpassenger compartment during various phases of flight. 11. The LD–MCR compartment must be designed such that fires within it can be controlled without a crewmember having to enter the compartment or be designed such that crewmembers equipped for fire-fighting have unrestricted access to the compartment. The time for a crewmember on the main deck to react to the fire alarm, don the fire-fighting equipment, and gain access E:\FR\FM\07JNP1.SGM 07JNP1 jbell on DSK3GLQ082PROD with PROPOSALS Federal Register / Vol. 84, No. 110 / Friday, June 7, 2019 / Proposed Rules must not exceed the time for the compartment to become smoke-filled, making it difficult to locate the source of the fire. 12. There must be a means provided to exclude hazardous quantities of smoke or extinguishing agent originating in the LD–MCR compartment from entering any other compartment occupied by crewmembers or passengers. This means must include the time periods during the evacuation of the LD–MCR compartment and, if applicable, when accessing the LD–MCR compartment to manually fight a fire. Smoke entering any other compartment occupied by crewmembers or passengers when the LD–MCR compartment is opened during an emergency evacuation must dissipate within five minutes after the LD–MCR compartment is closed. Hazardous quantities of smoke may not enter any other compartment occupied by crewmembers or passengers during subsequent access to manually fight a fire in the LD–MCR compartment. (The amount of smoke entrained by a firefighter exiting the LD–MCR compartment through the access is not considered hazardous.) During the one-minute smoke detection time, penetration of a small quantity of smoke from the LD–MCR compartment into an occupied area is acceptable. Flight tests must be conducted to show compliance with this requirement. If a built-in fire suppression system is used in lieu of manual fire-fighting, the fire suppression system must be designed so that no hazardous quantities of extinguishing agent will enter other compartments occupied by passengers or crewmembers. The system must have adequate capacity to suppress any likely fire occurring in the LD–MCR compartment, considering the fire threat, the volume of the compartment and the ventilation rate. 13. For each seat and berth in the LD– MCR compartment, there must be a supplemental oxygen system equivalent to that provided for main deck passengers. The system must provide an aural and visual warning to alert the occupants of the LD–MCR compartment of the need to don oxygen masks in the event of decompression. The warning must activate before the cabin pressure altitude exceeds 15,000 feet. The aural warning must sound continuously for a minimum of five minutes or until a reset push button in the LD–MCR compartment is depressed. Procedures for crewmembers in the LD–MCR compartment to follow in the event of decompression must be established. These procedures must be transmitted VerDate Sep<11>2014 16:40 Jun 06, 2019 Jkt 247001 to the operator for incorporation into their training programs and appropriate operational manuals. 14. The following requirements apply to LD–MCR compartments that are divided into several sections by the installation of curtains or doors: a. To warn crewmembers who may be sleeping, there must be an aural alert that accompanies automatic presentation of supplemental oxygen masks. The alert must be able to be heard in each section of the LD–MCR compartment. A visual indicator that occupants must don an oxygen mask is required in each section where seats or berths are not installed. A minimum of two supplemental oxygen masks is required for each seat or berth. There must also be a means to manually deploy the oxygen masks from the flightdeck. b. A placard is required adjacent to each curtain that visually divides or separates the LD–MCR compartment into small sections for privacy purposes. The placard must indicate that the curtain is to remain open when the private section it creates is unoccupied. c. For each section created by the installation of a curtain, the following requirements of these special conditions must be met both with the curtain open and with the curtain closed: (1) Emergency illumination (Special Condition No. 5); (2) Aural emergency alarm (Special Condition No. 7); (3) Fasten seat belt signal or return to seat signal as applicable (Special Condition No. 8); and (4) Smoke or fire detection (Special Condition No. 10). d. Crew rest compartments visually divided to the extent that evacuation could be affected must have exit signs that direct occupants to the primary stairway exit. The exit signs must be provided in each separate section of the LD–MCR compartment and must meet the requirements of § 25.812(b)(1)(i) at amendment 25–58. An exit sign with reduced background area, as described in Special Condition No. 4(a), may be used to meet this requirement. e. For sections within a LD–MCR compartment that are created by the installation of a partition with a door separating the sections, the following requirements of these special conditions must be met with the door open and with the door closed: (1) There must be a secondary evacuation route from each section to the main deck, or it must be shown that any door between the sections has been designed to preclude anyone from being trapped inside the compartment. Removal of an incapacitated PO 00000 Frm 00005 Fmt 4702 Sfmt 4702 26597 crewmember from this area must be considered. A secondary evacuation route from a small room designed for only one occupant for a short period of time, such as a changing area or lavatory, is not required. However, removal of an incapacitated occupant from this area must be considered. (2) Any door between the sections must be shown to be openable when crowded against, even when crowding occurs at each side of the door. (3) There may be no more than one door between any seat or berth and the primary stairway exit. (4) There must be exit signs in each section that meet the requirements of § 25.812(b)(1)(i) at amendment 25–58 that direct occupants to the primary stairway exit. An exit sign with reduced background area, as described in Special Condition No. 4(a), may be used to meet this requirement. (5) Special Conditions No. 5 (emergency illumination), No. 7 (aural emergency alarm), No. 8 (fasten seat belt signal or return to seat signal as applicable) and No. 10 (smoke and fire detection) must be met both with the door open and the door closed. (6) Special Conditions No. 6 (two-way voice communication) and No. 9 (PBE and other equipment) must be met independently for each separate section, except in lavatories or other small areas that are not intended to be occupied for extended periods of time. 15. Where a waste disposal receptacle is fitted, it must be equipped with a built-in fire extinguisher designed to discharge automatically upon occurrence of a fire in the receptacle. 16. Materials, including finishes or decorative surfaces applied to the materials, must comply with the flammability standards of § 25.853 at amendment 25–66. Mattresses must comply with the flammability standards of § 25.853(b) and (c) at amendment 25– 66. 17. A lavatory within the LD–MCR compartment must meet the same requirements as a lavatory installed on the main deck, except with regard to Special Condition No. 10 for smoke detection. 18. When a LD–MCR compartment is installed or enclosed as a removable module in part of a cargo compartment or is located directly adjacent to a cargo compartment without an intervening cargo compartment wall, the following conditions apply: a. Any wall of the LD–MCR compartment, which forms part of the boundary of the reduced cargo compartment and is subject to direct flame impingement from a fire in the cargo compartment, and any interface E:\FR\FM\07JNP1.SGM 07JNP1 26598 Federal Register / Vol. 84, No. 110 / Friday, June 7, 2019 / Proposed Rules item between the LD–MCR compartment and the airplane structure or systems must meet the applicable requirements of § 25.855 at amendment 25–60. b. Means must be provided to ensure that the fire protection level of the cargo compartment meets the applicable requirements of §§ 25.855 at amendment 25–60; 25.857 at amendment 25–60; and 25.858 at amendment 25–54 when the LD–MCR compartment is not installed. c. Use of each emergency evacuation route must not require occupants of the LD–MCR compartment to enter the cargo compartment in order to return to the passenger compartment. d. The aural emergency alarm specified in Special Condition No. 7 must sound in the LD–MCR compartment in the event of a fire in the cargo compartment. 19. Means must be provided to prevent access into the Class C cargo compartment, whether or not the LD– MCR is installed, during all airplane flight operations and to ensure that the maintenance door is closed and secured during all airplane flight operations. 20. All enclosed stowage compartments within the LD–MCR compartment that are not limited to stowage of emergency equipment or airplane supplied equipment (i.e., bedding), must meet the design criteria given in the table below. As indicated in the table, enclosed stowage compartments larger than 200 ft3 in interior volume are not addressed by this Special Condition. The in-flight accessibility of very large enclosed stowage compartments and the subsequent impact on the crewmembers’ ability to effectively reach any part of the compartment with the contents of a hand fire extinguisher will require additional fire protection considerations similar to those required for inaccessible compartments such as Class C cargo compartments. Stowage compartment interior volumes Fire protection features Materials of Construction 1 .................................................................................................. Detectors 2 ........................................................................................................................... Liner 3 .................................................................................................................................. Location Detector 4 .............................................................................................................. Less than 25 ft3 25 ft3 to 57 ft3 Yes ................... No ..................... No ..................... No ..................... Yes ................... Yes ................... No ..................... Yes ................... 57 ft3 to 200 ft3 Yes. Yes. Yes. Yes. 1 Material: The material used to construct each enclosed stowage compartment must at least be fire resistant and must meet the flammability standards established for interior components per the requirements of § 25.853. For compartments less than 25 ft3 in interior volume, the design must ensure the ability to contain a fire likely to occur within the compartment under normal use. 2 Detectors: Enclosed stowage compartments equal to or exceeding 25 ft3 in interior volume must be provided with a smoke or fire detection system to ensure that a fire can be detected within a one-minute detection time. Flight tests must be conducted to show compliance with this requirement. Each system (or systems) must provide: (a) A visual indication in the flight-deck within one minute after the start of a fire; (b) An aural warning in the crew rest compartment; and (c) A warning in the main passenger cabin. This warning must be readily detectable by a flight attendant, taking into consideration the positioning of flight attendants throughout the main passenger compartment during various phases of flight. 3 Liner: If it can be shown that the material used to construct the stowage compartment meets the flammability requirements of a liner for a Class B cargo compartment, no liner would be required for enclosed stowage compartments equal to or greater than 25 ft3 but less than 57 ft3 in interior volume. For all enclosed stowage compartments equal to or greater than 57 ft3 but less than or equal to 200 ft3 in interior volume, a liner must be provided that meets the requirements of § 25.855 at amendment 25–60 for a Class B cargo compartment. 4 Location Detector: LD–MCR compartments that contain enclosed stowage compartments with an interior volume that exceeds 25 ft3 and are located away from one central location, such as the entry to the LD–MCR compartment or a common area within the LD–MCR compartment, would require additional fire protection features or devices to assist the firefighter in determining the location of a fire. Issued in Des Moines, Washington, on May 31, 2019. Paul Siegmund, Acting Manager, Transport Standards Branch, Policy and Innovation Division, Aircraft Certification Service. [FR Doc. 2019–11957 Filed 6–6–19; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2019–0400; Product Identifier 2019–NM–022–AD] jbell on DSK3GLQ082PROD with PROPOSALS RIN 2120–AA64 Airworthiness Directives; Airbus SAS Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: VerDate Sep<11>2014 16:40 Jun 06, 2019 Jkt 247001 The FAA proposes to adopt a new airworthiness directive (AD) for all Airbus SAS Model A321–111, A321– 112, A321–131, A321–211, A321–212, A321–213, A321–231 and A321–232 airplanes. This proposed AD was prompted by a quality control review, which determined that the wrong aluminum alloy was used to manufacture several structural parts. This proposed AD would require a onetime eddy current conductivity measurement of certain structural parts of the outer flaps to determine if the incorrect alloy was used, and replacement if necessary, as specified in an European Aviation Safety Agency (EASA) AD, which will be incorporated by reference. The FAA is proposing this AD to address the unsafe condition on these products. DATES: The FAA must receive comments on this proposed AD by July 22, 2019. ADDRESSES: You may send comments, using the procedures found in 14 CFR 11.43 and 11.45, by any of the following methods: SUMMARY: PO 00000 Frm 00006 Fmt 4702 Sfmt 4702 • Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments. • Fax: 202–493–2251. • Mail: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE, Washington, DC 20590. • Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For the material identified in this proposed AD that will be incorporated by reference (IBR), contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221 89990 1000; email ADs@easa.europa.eu; internet www.easa.europa.eu. You may find this IBR material on the EASA website at https://ad.easa.europa.eu. You may view this IBR material at the FAA, Transport Standards Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206–231–3195. It is also available in the AD docket on E:\FR\FM\07JNP1.SGM 07JNP1

Agencies

[Federal Register Volume 84, Number 110 (Friday, June 7, 2019)]
[Proposed Rules]
[Pages 26593-26598]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2019-11957]


========================================================================
Proposed Rules
                                                Federal Register
________________________________________________________________________

This section of the FEDERAL REGISTER contains notices to the public of 
the proposed issuance of rules and regulations. The purpose of these 
notices is to give interested persons an opportunity to participate in 
the rule making prior to the adoption of the final rules.

========================================================================


Federal Register / Vol. 84, No. 110 / Friday, June 7, 2019 / Proposed 
Rules

[[Page 26593]]



DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 25

[Docket No. FAA-FAA-2019-0427; Notice No. 25-19-07-SC]


Special Conditions: TTF Aerospace, LLC, Airbus Model A330-300 and 
Model A330-900 Series Airplanes; Bulk Cargo Lower Deck Crew Rest 
Compartments

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed special conditions.

-----------------------------------------------------------------------

SUMMARY: This action proposes special conditions for the Airbus Model 
A330-300 and Model A330-900 series airplanes. These airplanes, as 
modified by TTF Aerospace, LLC (TTF Aerospace), will have a novel or 
unusual design feature when compared to the state of technology 
envisioned in the airworthiness standards for transport category 
airplanes. This design feature is a lower deck mobile crew rest (LD-
MCR) installed in the aft cargo compartment of Model A330-300 and Model 
A330-900 series airplanes. The applicable airworthiness regulations do 
not contain adequate or appropriate safety standards for this design 
feature. These proposed special conditions contain the additional 
safety standards that the Administrator considers necessary to 
establish a level of safety equivalent to that established by the 
existing airworthiness standards.

DATES: Send comments on or before June 27, 2019.

ADDRESSES: Send comments identified by Docket No. FAA-2019-0427 using 
any of the following methods:
     Federal eRegulations Portal: Go to https://www.regulations.gov/ and follow the online instructions for sending 
your comments electronically.
     Mail: Send comments to Docket Operations, M-30, U.S. 
Department of Transportation (DOT), 1200 New Jersey Avenue SE, Room 
W12-140, West Building Ground Floor, Washington, DC 20590-0001.
     Hand Delivery or Courier: Take comments to Docket 
Operations in Room W12-140 of the West Building Ground Floor at 1200 
New Jersey Avenue SE, Washington, DC, between 9 a.m. and 5 p.m., Monday 
through Friday, except Federal holidays.
     Fax: Fax comments to Docket Operations at 202-493-2251.
    Privacy: The FAA will post all comments it receives, without 
change, to https://www.regulations.gov/, including any personal 
information the commenter provides. Using the search function of the 
docket website, anyone can find and read the electronic form of all 
comments received into any FAA docket, including the name of the 
individual sending the comment (or signing the comment for an 
association, business, labor union, etc.). DOT's complete Privacy Act 
Statement can be found in the Federal Register published on April 11, 
2000 (65 FR 19477-19478).
    Docket: Background documents or comments received may be read at 
https://www.regulations.gov/ at any time. Follow the online instructions 
for accessing the docket or go to Docket Operations in Room W12-140 of 
the West Building Ground Floor at 1200 New Jersey Avenue SE, 
Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, 
except Federal holidays.

FOR FURTHER INFORMATION CONTACT: Alan Sinclair, Airframe & Cabin Safety 
Section, AIR-675, Transport Standards Branch, Policy and Innovation 
Division, Aircraft Certification Service, Federal Aviation 
Administration, 2200 South 216th Street, Des Moines, Washington 98198; 
telephone and fax 206 231 3215; email [email protected].

SUPPLEMENTARY INFORMATION:

Comments Invited

    We invite interested people to take part in this rulemaking by 
sending written comments, data, or views. The most helpful comments 
reference a specific portion of the special conditions, explain the 
reason for any recommended change, and include supporting data.
    We will consider all comments we receive by the closing date for 
comments. We may change these special conditions based on the comments 
we receive.

Background

    On February 20, 2019, TTF Aerospace applied for a supplemental type 
certificate for a LD-MCR installed in the aft cargo compartment of 
Airbus Model A330-300 and Model A330-900 series airplanes. The Airbus 
Model A330-300 and Model A330-900 series airplanes are twin-engine, 
transport category airplanes with maximum takeoff weights of 405,650 
and 533,518 pounds, respectively, and seating for 440 passengers.
    The LD-MCR compartment will be located under the passenger cabin 
floor in the aft cargo compartment of Airbus Model A330-300 and Model 
A330-900 airplanes. It will be removable from the cargo compartment. 
The LD-MCR compartment will be occupied in flight but not during taxi, 
takeoff, or landing. No more than ten crewmembers at a time will be 
permitted to occupy it. The LD-MCR compartment will have a smoke 
detection system, a fire suppression system, and an oxygen system.
    The LD-MCR compartment will be accessed from the main deck via a 
``stairhouse.'' The floor within the stairhouse has a hatch that leads 
to stairs that occupants use to descend into the LD-MCR compartment. An 
interface will keep this hatch open when the stairhouse door is open. 
In addition, there will be an emergency hatch that opens directly into 
the main passenger cabin. The LD-MCR compartment has a maintenance 
door. This door is intended to be used to allow maintenance personnel 
and cargo handlers to enter the LD-MCR from the cargo compartment when 
the airplane is not in flight.

Type Certification Basis

    Under the provisions of title 14, Code of Federal Regulations (14 
CFR) 21.101, TTF Aerospace must show that the Airbus Model A330-300 and 
Model A330-900 series airplanes, as changed, continue to meet the 
applicable provisions of the regulations listed in Type Certificate No. 
A46NM or the applicable regulations in effect on the date of 
application for the change, except for earlier amendments as agreed 
upon by the FAA.
    If the Administrator finds that the applicable airworthiness 
regulations (i.e., 14 CFR part 25) do not contain adequate or 
appropriate safety standards

[[Page 26594]]

for the Airbus Model A330-300 and Model A330-900 series airplanes 
because of a novel or unusual design feature, special conditions are 
prescribed under the provisions of Sec.  21.16.
    Special conditions are initially applicable to the model for which 
they are issued. Should the applicant apply for a supplemental type 
certificate to modify any other model included on the same type 
certificate to incorporate the same novel or unusual design feature, 
these special conditions would also apply to the other model under 
Sec.  21.101.
    In addition to the applicable airworthiness regulations and special 
conditions, the Airbus Model A330-300 and Model A330-900 series 
airplanes must comply with the fuel vent and exhaust emission 
requirements of 14 CFR part 34 and the noise certification requirements 
of 14 CFR part 36.
    The FAA issues special conditions, as defined in 14 CFR 11.19, in 
accordance with Sec.  11.38, and they become part of the type 
certification basis under Sec.  21.101.

Novel or Unusual Design Features

    The Airbus Model A330-300 and Model A330-900 series airplanes will 
incorporate the following novel or unusual design features:
    This design feature is a LD-MCR installed in the aft cargo 
compartment of Model A330-300 and Model A330-900 series airplanes.

Discussion

    While the installation of the crew rest compartment is not a new 
concept for large transport category airplanes, each crew rest 
compartment has unique features based on design, location, and use on 
the airplane. The LD-MCR compartment is novel in terms of part 25 of 
title 14 of the CFR in that it will be located under the passenger 
cabin floor in the aft cargo compartment of Airbus Model A330-300 and 
Model A330-900 series airplanes, which is not contemplated by Sec.  
25.819 regarding lower deck service compartments (including galleys). 
Due to the novel or unusual features associated with the installation 
of a LD-MCR compartment, special conditions are considered necessary to 
provide a level of safety equal to that established by the 
airworthiness regulations incorporated by reference in the type 
certificates of these airplanes as applicable airworthiness regulations 
do not contain adequate or appropriate safety standards for this design 
feature.
    Most of these special conditions come from Sec.  25.819 but they 
require more stringent standards for fire protection and emergency 
egress, because of design features and location of the LD-MCR. The 
applicant should note that the FAA considers smoke or fire detection 
and fire suppression systems (including airflow management features 
that prevent hazardous quantities of smoke or fire extinguishing agent 
from entering any other compartment occupied by crewmembers or 
passengers) for crew rest compartments complex in terms of paragraph 6d 
of Advisory Circular (AC) 25.1309-1A, ``System Design and Analysis,'' 
dated June 21, 1988. In addition, the FAA considers failure of the crew 
rest compartment fire protection system (i.e., smoke or fire detection 
and fire suppression systems) in conjunction with a crew rest fire to 
be a catastrophic event. Based on the ``Depth of Analysis Flowchart'' 
shown in Figure 2 of AC 25.1309-1A, the depth of analysis should 
include both qualitative and quantitative assessments. Refer to 
paragraphs 8d, 9, and 10 of AC 25.1309-1A. In addition, it should be 
noted that flammable fluids, explosives, or other dangerous cargo are 
prohibited from being carried in the crew rest areas.
    The requirements to enable crewmembers' quick entry to the crew 
rest compartment and to locate a fire source inherently places limits 
on the amount of baggage that may be carried and the size of the crew 
rest area. The FAA considers that the crew rest area must be limited to 
the stowage of crew personal luggage and must not be used for the 
stowage of cargo or passenger baggage. The design of such a system to 
include cargo or passenger baggage would require additional 
requirements to ensure safe operation.
    Furthermore, the addition of galley equipment or a kitchenette 
incorporating a heat source (e.g., cook tops, microwaves, coffee pots, 
etc.), other than a conventional lavatory or kitchenette hot water 
heater, within the LD-MCR compartment defined in the ``Novel or Unusual 
Design Features'' section, may require additional special conditions to 
be considered. A hot water heater is acceptable without further special 
conditions consideration.
    Finally, amendment 25-38 modified the requirements of Sec.  
25.1439(a) by adding, ``In addition, protective breathing equipment 
must be installed in each isolated separate compartment in the 
airplane, including upper and lower lobe galleys, in which crewmember 
occupancy is permitted during flight for the maximum number of 
crewmembers expected to be in the area during any operation.'' The LD-
MCR compartment is an isolated separate compartment, so Sec.  
25.1439(a) is applicable. However, the Sec.  25.1439(a) protective 
breathing equipment (PBE) requirements for isolated separate 
compartments are not appropriate because the LD-MCR is novel or unusual 
in terms of the number of occupants.
    In 1976, when amendment 25-38 was adopted, small galleys were the 
only isolated compartments that had been certificated. Two crewmembers 
were the maximum expected to occupy those galleys.
    This crew rest compartment can accommodate up to ten crewmembers. 
This large number of occupants in an isolated compartment was not 
envisioned at the time amendment 25-38 was adopted. It is not 
appropriate for all occupants to don PBEs in the event of a fire 
because the first action should be to leave the confined space unless 
the occupant is fighting the fire. Taking the time to don the PBE would 
prolong the time for the emergency evacuation of the occupants and 
possibly interfere with efforts to extinguish the fire. These special 
conditions therefore provide procedures that establish a level of 
safety equivalent to the PBE requirements.

Operational Evaluations and Approval

    These special conditions outline requirements for flightcrew and 
cabin crew rest compartment design approvals (e.g., type design change 
or supplemental type certificate) administered by the FAA's Aircraft 
Certification Service. Prior to operational use of a flight (cabin) 
crew rest compartment, the FAA's Flight Standards Service must evaluate 
for operational suitability the flight (cabin) crew sleeping quarters 
and rest facilities. Refer to Sec. Sec.  91.1061(b)(1), 121.485(a), 
121.523(b), and 135.269(b)(5).
    Compliance with these special conditions does not ensure that the 
applicant has demonstrated compliance with the requirements of 14 CFR 
parts 91, 121, or 135.
    To obtain an operational evaluation, the type design holder must 
contact the appropriate Aircraft Evaluation Group (AEG) in the Flight 
Standards Service and request an evaluation for operational suitability 
of the flightcrew sleeping quarters in their crew rest facility. 
Results of these evaluations should be documented and appended to the 
applicable Flight Standardization Board (FSB) Report. Individual 
operators may reference these standardized evaluations in discussions 
with their FAA Principal Operating Inspector (POI) as the basis for an

[[Page 26595]]

operational approval, in lieu of an on-site operational evaluation.
    Any changes to the approved flight (cabin) crew rest compartment 
configuration that affect crewmember emergency egress or any other 
procedures affecting the safety of the occupying crewmembers and/or 
related training shall require a re-evaluation and approval. In the 
event of any design change that affects egress, safety procedures, or 
training, the applicant is responsible for notifying the FAA's AEG that 
a new crew rest facility evaluation is required.
    All instructions for continued airworthiness (ICAs) will be 
submitted to the Seattle AEG for approval acceptance, including service 
bulletins, before issuance of the FAA modification approval.
    These proposed special conditions are the same as Special Condition 
25-281-SC, except the maximum occupancy is ten rather than seven 
occupants and a change to the table in Special Condition 20. The 
proposed conditions provide an appropriate level of safety for the 
proposed occupancy limit as only the size of the compartment will 
increase to accommodate the additional occupants but all other 
requirements for safety, fire suppression, and emergency evacuation 
will remain the same. In addition, the change to the table in Special 
Condition 20 is related to the location of the crew rest and specifics 
of the crew rest design. Stowage compartments located in the vicinity 
of critical equipment or located in an overhead area would typically be 
listed as conditional. However, this LD-MCR is located in the Class C 
cargo compartment with all of its features that provide fire protection 
(e.g., the use of liner material that meets appendix F to part 25, part 
III; control of ventilation; active fire suppression; active fire 
detection; etc.). These features remain when the crew rest is 
installed.
    The proposed special conditions contain the additional safety 
standards that the Administrator considers necessary to establish a 
level of safety equivalent to that established by the existing 
airworthiness standards.

Applicability

    As discussed above, these special conditions are applicable to the 
Airbus Model A330-300 and Model A330-900 airplanes. Should TTF 
Aerospace apply at a later date for a supplemental type certificate to 
modify any other model included on Type Certificate No. A46NM to 
incorporate the same novel or unusual design feature, these special 
conditions would apply to that model as well.
    Certification of the Airbus Model A330-300 and Model A330-900 
airplanes with the LD-MCR is currently scheduled for June 2019. The 
substance of these special conditions has been subject to the notice 
and public comment procedure in several prior instances. Therefore, 
because a delay would significantly affect the applicant's installation 
of the system and the certification of the airplane, we are shortening 
the public comment period to 20 days.

Conclusion

    This action affects only a certain novel or unusual design feature 
on Airbus Model A330-300 and Model A330-900 of airplanes. It is not a 
rule of general applicability and affects only the applicant who 
applied to the FAA for approval of these features on the airplane.

List of Subjects in 14 CFR Part 25

    Aircraft, Aviation safety, Reporting and recordkeeping 
requirements.

Authority Citation

    The authority citation for these special conditions is as follows:

    Authority: 49 U.S.C. 106(f), 106(g), 40113, 44701, 44702, 44704.

The Proposed Special Conditions

    Accordingly, the Federal Aviation Administration (FAA) proposes the 
following special conditions as part of the type certification basis 
for Airbus Model A330-300 and Model A330-900 airplanes, as modified by 
TTF Aerospace.
    1. Occupancy of the LD-MCR compartment is limited to the total 
number of installed bunks and seats in each compartment. For each 
occupant permitted in the LD-MCR compartment, there must be an approved 
seat or berth able to withstand the maximum flight loads when occupied. 
The maximum occupancy in the LD-MCR compartment is ten.
    a. There must be appropriate placards displayed in a conspicuous 
place at each entrance to the LD-MCR compartment indicating the 
following information:
    (1) The maximum number of occupants allowed;
    (2) That occupancy is restricted to crewmembers trained in the 
evacuation procedures for the LD-MCR compartment;
    (3) That occupancy is prohibited during taxi, takeoff and landing;
    (4) That smoking is prohibited in the LD-MCR compartment; and
    (5) That the LD-MCR compartment is limited to the stowage of 
personal luggage of crewmembers and must not be used for the stowage of 
cargo or passenger baggage.
    b. There must be at least one ashtray located conspicuously on or 
near the entry side of any entrance to the LD-MCR compartment.
    c. There must be a means to prevent passengers from entering the 
LD-MCR compartment in an emergency or when no flight attendant is 
present.
    d. There must be a means for any door installed between the LD-MCR 
compartment and the passenger cabin to be capable of being quickly 
opened from inside the LD-MCR compartment, even when crowding occurs at 
each side of the door.
    e. For all doors installed in the evacuation routes, there must be 
a means to preclude anyone from being trapped inside a compartment. If 
a locking mechanism is installed, it must be capable of being unlocked 
from the outside without the aid of special tools. The lock must not 
prevent opening from the inside of a compartment at any time.
    2. There must be at least two emergency evacuation routes, which 
could be used by each occupant of the LD-MCR compartment to rapidly 
evacuate to the main cabin and could be closed from the main passenger 
cabin after evacuation.
    a. The routes must be located with one at each end of the LD-MCR 
compartment or with two having sufficient separation within the LD-MCR 
compartment and between the routes to minimize the possibility of an 
event (either inside or outside of the LD-MCR compartment) rendering 
both routes inoperative.
    b. The routes must be designed to minimize the possibility of 
blockage, which might result from fire, mechanical or structural 
failure, or from persons standing on top of or against the escape 
route. If an evacuation route utilizes an area where normal movement of 
passengers occurs, it must be demonstrated that passengers would not 
impede egress to the main deck. If a hatch is installed in an 
evacuation route, the point at which the evacuation route terminates in 
the passenger cabin should not be located where normal movement by 
passengers or crew occur, such as in a main aisle, cross aisle, 
passageway or galley complex.
    If such a location cannot be avoided, special consideration must be 
taken to ensure that the hatch or door can be opened when a person who 
is the weight of a ninety-fifth percentile male is standing on the 
hatch or door.
    The use of evacuation routes must not be dependent on any powered 
device. If there is low headroom at or near an

[[Page 26596]]

evacuation route, provision must be made to prevent or to protect 
occupants of the LD-MCR compartment from head injury.
    c. Emergency evacuation procedures, including the emergency 
evacuation of an incapacitated crewmember from the LD-MCR compartment, 
must be established. All of these procedures must be transmitted to the 
operator for incorporation into its training programs and appropriate 
operational manuals.
    d. There must be a limitation in the Airplane Flight Manual or 
other suitable means requiring that crewmembers be trained in the use 
of evacuation routes.
    3. There must be a means for the evacuation of an incapacitated 
crewmember who is representative of a 95th percentile male from the LD-
MCR compartment to the passenger cabin floor. The evacuation must be 
demonstrated for all evacuation routes. A flight attendant or other 
crewmember (a total of one assistant within the LD-MCR compartment) may 
provide assistance in the evacuation. Additional assistance may be 
provided by up to three persons in the main passenger compartment. For 
evacuation routes having stairways, the additional assistants may 
descend down to one half the elevation change from the main deck to the 
LD-MCR compartment or to the first landing, whichever is higher.
    4. The following signs and placards must be provided in the LD-MCR 
compartment:
    a. At least one exit sign that meets the requirements of Sec.  
25.812(b)(1)(i) at amendment 25-58 must be located near each exit. 
However, a sign with reduced background area of no less than 5.3 square 
inches (excluding the letters) may be utilized, provided that it is 
installed such that the material surrounding the exit sign is light in 
color (e.g., white, cream, light beige). If the material surrounding 
the exit sign is not light in color, a sign with a minimum of a one-
inch wide background border around the letters would also be 
acceptable;
    b. An appropriate placard that defines the location and the 
operating instructions for each evacuation route must be located near 
each exit;
    c. Placards must be readable from a distance of 30 inches under 
emergency lighting conditions; and
    d. The exit handles and the placards with the evacuation path 
operating instructions must be illuminated to at least 160 
microlamberts under emergency lighting conditions.
    5. There must be a means for emergency illumination to be 
automatically provided for the LD-MCR compartment in the event of 
failure of the main power system of the airplane or of the normal 
lighting system of the LD-MCR compartment.
    a. This emergency illumination must be independent of the main 
lighting system.
    b. The sources of general cabin illumination may be common to both 
the emergency and the main lighting systems, if the power supply to the 
emergency lighting system is independent of the power supply to the 
main lighting system.
    c. The illumination level must be sufficient for the occupants of 
the LD-MCR compartment to locate and transfer to the main passenger 
cabin floor by means of each evacuation route.
    d. The illumination level must be sufficient to locate a deployed 
oxygen mask with the privacy curtains in the closed position for each 
occupant of the LD-MCR compartment.
    6. There must be means for two-way voice communications between 
crewmembers on the flightdeck and crewmembers in the LD-MCR 
compartment. Section 25.785(h) at amendment 25-51 requires flight 
attendant seats near required floor level emergency exits. Each such 
exit seat on the aircraft must have a public address system microphone 
that allows two-way voice communications between flight attendants and 
crewmembers in the LD-MCR compartment. One microphone may serve more 
than one such exit seat, provided the proximity of the exits allows 
unassisted verbal communications between seated flight attendants.
    7. There must be a means for manual activation of an aural 
emergency alarm system, audible during normal and emergency conditions, 
to enable crewmembers on the flightdeck and at each pair of required 
floor-level emergency exits to alert crewmembers in the LD-MCR 
compartment of an emergency. Use of a public address or crew interphone 
system will be acceptable, provided an adequate means of 
differentiating between normal and emergency communications is 
incorporated. The system must be powered in flight for at least ten 
minutes after the shutdown or failure of all engines and auxiliary 
power units (APU) or the disconnection or failure of all power sources 
that are dependent on the continued operation of the engines and APUs.
    8. There must be a means, readily detectable by seated or standing 
occupants of the LD-MCR compartment, which indicates when seat belts 
should be fastened. If there are no seats, at least one means, such as 
sufficient handholds, must be provided to cover anticipated turbulence. 
Seat belt-type restraints must be provided for berths and must be 
compatible with the sleeping attitude during cruise conditions. There 
must be a placard on each berth indicating that seat belts must be 
fastened when the berth is occupied. If compliance with any of the 
other requirements of these special conditions is predicated on 
specific head location, there must be a placard specifying the head 
position.
    9. To provide a level of safety equivalent to that provided to 
occupants of a small isolated galley, in lieu of the requirements of 
Sec.  25.1439(a) at amendment 25-38 that pertain to isolated 
compartments, the following equipment must be provided in the LD-MCR 
compartment:
    a. At least one approved hand-held fire extinguisher appropriate 
for the kinds of fires likely to occur;
    b. Two portable Protective Breathing Equipment (PBE) units approved 
to Technical Standard Order (TSO)-C116 or equivalent, which are 
suitable for fire-fighting, or one PBE for each hand-held fire 
extinguisher, whichever is greater; and
    c. One flashlight.


    Note:  Additional PBEs and fire extinguishers in specific 
locations, beyond the minimum numbers prescribed in Special 
Condition No. 9, may be required as a result of any egress analysis 
accomplished to satisfy Special Condition No. 2(a).


    10. A smoke or fire detection system or systems must be provided to 
monitor each occupiable area within the LD-MCR compartment, including 
those areas partitioned by curtains. Flight tests must be conducted to 
show compliance with this requirement. Each smoke or fire detection 
system must provide the following:
    a. A visual indication to the flightdeck within one minute after 
the start of a fire;
    b. An aural warning in the LD-MCR compartment; and
    c. A warning in the main passenger cabin. This warning must be 
readily detectable by a flight attendant, taking into consideration the 
positioning of flight attendants throughout the main-passenger 
compartment during various phases of flight.
    11. The LD-MCR compartment must be designed such that fires within 
it can be controlled without a crewmember having to enter the 
compartment or be designed such that crewmembers equipped for fire-
fighting have unrestricted access to the compartment. The time for a 
crewmember on the main deck to react to the fire alarm, don the fire-
fighting equipment, and gain access

[[Page 26597]]

must not exceed the time for the compartment to become smoke-filled, 
making it difficult to locate the source of the fire.
    12. There must be a means provided to exclude hazardous quantities 
of smoke or extinguishing agent originating in the LD-MCR compartment 
from entering any other compartment occupied by crewmembers or 
passengers. This means must include the time periods during the 
evacuation of the LD-MCR compartment and, if applicable, when accessing 
the LD-MCR compartment to manually fight a fire. Smoke entering any 
other compartment occupied by crewmembers or passengers when the LD-MCR 
compartment is opened during an emergency evacuation must dissipate 
within five minutes after the LD-MCR compartment is closed.
    Hazardous quantities of smoke may not enter any other compartment 
occupied by crewmembers or passengers during subsequent access to 
manually fight a fire in the LD-MCR compartment. (The amount of smoke 
entrained by a firefighter exiting the LD-MCR compartment through the 
access is not considered hazardous.)
    During the one-minute smoke detection time, penetration of a small 
quantity of smoke from the LD-MCR compartment into an occupied area is 
acceptable. Flight tests must be conducted to show compliance with this 
requirement.
    If a built-in fire suppression system is used in lieu of manual 
fire-fighting, the fire suppression system must be designed so that no 
hazardous quantities of extinguishing agent will enter other 
compartments occupied by passengers or crewmembers. The system must 
have adequate capacity to suppress any likely fire occurring in the LD-
MCR compartment, considering the fire threat, the volume of the 
compartment and the ventilation rate.
    13. For each seat and berth in the LD-MCR compartment, there must 
be a supplemental oxygen system equivalent to that provided for main 
deck passengers. The system must provide an aural and visual warning to 
alert the occupants of the LD-MCR compartment of the need to don oxygen 
masks in the event of decompression. The warning must activate before 
the cabin pressure altitude exceeds 15,000 feet. The aural warning must 
sound continuously for a minimum of five minutes or until a reset push 
button in the LD-MCR compartment is depressed. Procedures for 
crewmembers in the LD-MCR compartment to follow in the event of 
decompression must be established. These procedures must be transmitted 
to the operator for incorporation into their training programs and 
appropriate operational manuals.
    14. The following requirements apply to LD-MCR compartments that 
are divided into several sections by the installation of curtains or 
doors:
    a. To warn crewmembers who may be sleeping, there must be an aural 
alert that accompanies automatic presentation of supplemental oxygen 
masks. The alert must be able to be heard in each section of the LD-MCR 
compartment. A visual indicator that occupants must don an oxygen mask 
is required in each section where seats or berths are not installed. A 
minimum of two supplemental oxygen masks is required for each seat or 
berth. There must also be a means to manually deploy the oxygen masks 
from the flightdeck.
    b. A placard is required adjacent to each curtain that visually 
divides or separates the LD-MCR compartment into small sections for 
privacy purposes. The placard must indicate that the curtain is to 
remain open when the private section it creates is unoccupied.
    c. For each section created by the installation of a curtain, the 
following requirements of these special conditions must be met both 
with the curtain open and with the curtain closed:
    (1) Emergency illumination (Special Condition No. 5);
    (2) Aural emergency alarm (Special Condition No. 7);
    (3) Fasten seat belt signal or return to seat signal as applicable 
(Special Condition No. 8); and
    (4) Smoke or fire detection (Special Condition No. 10).
    d. Crew rest compartments visually divided to the extent that 
evacuation could be affected must have exit signs that direct occupants 
to the primary stairway exit. The exit signs must be provided in each 
separate section of the LD-MCR compartment and must meet the 
requirements of Sec.  25.812(b)(1)(i) at amendment 25-58. An exit sign 
with reduced background area, as described in Special Condition No. 
4(a), may be used to meet this requirement.
    e. For sections within a LD-MCR compartment that are created by the 
installation of a partition with a door separating the sections, the 
following requirements of these special conditions must be met with the 
door open and with the door closed:
    (1) There must be a secondary evacuation route from each section to 
the main deck, or it must be shown that any door between the sections 
has been designed to preclude anyone from being trapped inside the 
compartment. Removal of an incapacitated crewmember from this area must 
be considered. A secondary evacuation route from a small room designed 
for only one occupant for a short period of time, such as a changing 
area or lavatory, is not required. However, removal of an incapacitated 
occupant from this area must be considered.
    (2) Any door between the sections must be shown to be openable when 
crowded against, even when crowding occurs at each side of the door.
    (3) There may be no more than one door between any seat or berth 
and the primary stairway exit.
    (4) There must be exit signs in each section that meet the 
requirements of Sec.  25.812(b)(1)(i) at amendment 25-58 that direct 
occupants to the primary stairway exit. An exit sign with reduced 
background area, as described in Special Condition No. 4(a), may be 
used to meet this requirement.
    (5) Special Conditions No. 5 (emergency illumination), No. 7 (aural 
emergency alarm), No. 8 (fasten seat belt signal or return to seat 
signal as applicable) and No. 10 (smoke and fire detection) must be met 
both with the door open and the door closed.
    (6) Special Conditions No. 6 (two-way voice communication) and No. 
9 (PBE and other equipment) must be met independently for each separate 
section, except in lavatories or other small areas that are not 
intended to be occupied for extended periods of time.
    15. Where a waste disposal receptacle is fitted, it must be 
equipped with a built-in fire extinguisher designed to discharge 
automatically upon occurrence of a fire in the receptacle.
    16. Materials, including finishes or decorative surfaces applied to 
the materials, must comply with the flammability standards of Sec.  
25.853 at amendment 25-66. Mattresses must comply with the flammability 
standards of Sec.  25.853(b) and (c) at amendment 25-66.
    17. A lavatory within the LD-MCR compartment must meet the same 
requirements as a lavatory installed on the main deck, except with 
regard to Special Condition No. 10 for smoke detection.
    18. When a LD-MCR compartment is installed or enclosed as a 
removable module in part of a cargo compartment or is located directly 
adjacent to a cargo compartment without an intervening cargo 
compartment wall, the following conditions apply:
    a. Any wall of the LD-MCR compartment, which forms part of the 
boundary of the reduced cargo compartment and is subject to direct 
flame impingement from a fire in the cargo compartment, and any 
interface

[[Page 26598]]

item between the LD-MCR compartment and the airplane structure or 
systems must meet the applicable requirements of Sec.  25.855 at 
amendment 25-60.
    b. Means must be provided to ensure that the fire protection level 
of the cargo compartment meets the applicable requirements of 
Sec. Sec.  25.855 at amendment 25-60; 25.857 at amendment 25-60; and 
25.858 at amendment 25-54 when the LD-MCR compartment is not installed.
    c. Use of each emergency evacuation route must not require 
occupants of the LD-MCR compartment to enter the cargo compartment in 
order to return to the passenger compartment.
    d. The aural emergency alarm specified in Special Condition No. 7 
must sound in the LD-MCR compartment in the event of a fire in the 
cargo compartment.
    19. Means must be provided to prevent access into the Class C cargo 
compartment, whether or not the LD-MCR is installed, during all 
airplane flight operations and to ensure that the maintenance door is 
closed and secured during all airplane flight operations.
    20. All enclosed stowage compartments within the LD-MCR compartment 
that are not limited to stowage of emergency equipment or airplane 
supplied equipment (i.e., bedding), must meet the design criteria given 
in the table below. As indicated in the table, enclosed stowage 
compartments larger than 200 ft\3\ in interior volume are not addressed 
by this Special Condition. The in-flight accessibility of very large 
enclosed stowage compartments and the subsequent impact on the 
crewmembers' ability to effectively reach any part of the compartment 
with the contents of a hand fire extinguisher will require additional 
fire protection considerations similar to those required for 
inaccessible compartments such as Class C cargo compartments.

----------------------------------------------------------------------------------------------------------------
                                                        Stowage compartment interior volumes
     Fire protection features      -----------------------------------------------------------------------------
                                       Less than 25 ft\3\       25 ft\3\ to 57 ft\3\      57 ft\3\ to 200 ft\3\
----------------------------------------------------------------------------------------------------------------
Materials of Construction \1\.....  Yes.....................  Yes.....................  Yes.
Detectors \2\.....................  No......................  Yes.....................  Yes.
Liner \3\.........................  No......................  No......................  Yes.
Location Detector \4\.............  No......................  Yes.....................  Yes.
----------------------------------------------------------------------------------------------------------------
\1\ Material: The material used to construct each enclosed stowage compartment must at least be fire resistant
  and must meet the flammability standards established for interior components per the requirements of Sec.
  25.853. For compartments less than 25 ft\3\ in interior volume, the design must ensure the ability to contain
  a fire likely to occur within the compartment under normal use.
\2\ Detectors: Enclosed stowage compartments equal to or exceeding 25 ft\3\ in interior volume must be provided
  with a smoke or fire detection system to ensure that a fire can be detected within a one-minute detection
  time. Flight tests must be conducted to show compliance with this requirement. Each system (or systems) must
  provide:
(a) A visual indication in the flight-deck within one minute after the start of a fire;
(b) An aural warning in the crew rest compartment; and
(c) A warning in the main passenger cabin. This warning must be readily detectable by a flight attendant, taking
  into consideration the positioning of flight attendants throughout the main passenger compartment during
  various phases of flight.
\3\ Liner: If it can be shown that the material used to construct the stowage compartment meets the flammability
  requirements of a liner for a Class B cargo compartment, no liner would be required for enclosed stowage
  compartments equal to or greater than 25 ft\3\ but less than 57 ft\3\ in interior volume. For all enclosed
  stowage compartments equal to or greater than 57 ft\3\ but less than or equal to 200 ft\3\ in interior volume,
  a liner must be provided that meets the requirements of Sec.   25.855 at amendment 25-60 for a Class B cargo
  compartment.
\4\ Location Detector: LD-MCR compartments that contain enclosed stowage compartments with an interior volume
  that exceeds 25 ft\3\ and are located away from one central location, such as the entry to the LD-MCR
  compartment or a common area within the LD-MCR compartment, would require additional fire protection features
  or devices to assist the firefighter in determining the location of a fire.


    Issued in Des Moines, Washington, on May 31, 2019.
Paul Siegmund,
Acting Manager, Transport Standards Branch, Policy and Innovation 
Division, Aircraft Certification Service.
[FR Doc. 2019-11957 Filed 6-6-19; 8:45 am]
 BILLING CODE 4910-13-P