Airworthiness Directives; Boeing Model 727 Airplanes, 36901-36905 [E7-13115]

Download as PDF Federal Register / Vol. 72, No. 129 / Friday, July 6, 2007 / Proposed Rules the economic and marketing conditions which relate to the proposed amendments of the order; (ii) determining whether there is a need for the proposed amendments to the order; and (iii) determining whether the proposed amendments or appropriate modifications thereof will tend to effectuate the declared policy of the Act. Testimony is invited at the hearing on all the proposals and recommendations contained in this notice, as well as any appropriate modifications or alternatives. All persons wishing to submit written material as evidence at the hearing should be prepared to submit four copies of such material at the hearing and should have prepared testimony available for presentation at the hearing. From the time the notice of hearing is issued and until the issuance of a final decision in this proceeding, USDA employees involved in the decisional process are prohibited from discussing the merits of the hearing issues on an ex parte basis with any person having an interest in the proceeding. The prohibition applies to employees in the following organizational units: Office of the Secretary of Agriculture; Office of the Administrator, AMS; Office of the General Counsel, except any designated employee of the General Counsel assigned to represent the Board in this proceeding; and the Fruit and Vegetable Programs, AMS. Procedural matters are not subject to the above prohibition and may be discussed at any time. List of Subjects in 7 CFR Part 981 Almonds, Marketing agreements, Nuts, Reporting and recordkeeping requirements. Authority: 7 U.S.C. 601–674. 2. Testimony is invited on the following proposals or appropriate alternatives or modifications to such proposals. Proposals submitted by the Almond Board of California: rmajette on PROD1PC64 with PROPOSALS Proposal Number 1 3. Add § 981.43 to read as follows: Marking or labeling of containers. The Board may, with the approval of the Secretary, recommend regulations to require handlers to mark or label the containers that are used in packaging or handling almonds. Container means a box, bin, bag, carton, or any other type 15:25 Jul 05, 2007 Jkt 211001 4. Revise § 981.42 by adding a new sentence at the end of paragraph (b) to read as follows: § 981.42 Quality control. * * * * * (b) * * * The Board may, with the approval of the Secretary, recommend different outgoing quality requirements for different markets. Proposal submitted by USDA: Proposal Number 3 Make such changes as may be necessary to the order or its administrative rules and regulations to conform with any amendment that may result from the hearing. Dated: June 29, 2007. Lloyd C. Day, Administrator, Agricultural Marketing Service. [FR Doc. E7–13073 Filed 7–5–07; 8:45 am] BILLING CODE 3410–02–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2007–28382; Directorate Identifier 2006–NM–179–AD] RIN 2120–AA64 Airworthiness Directives; Boeing Model 727 Airplanes Comments Invited SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) for all Boeing Model 727 airplanes. This proposed AD would require revising the FAA-approved maintenance program by incorporating new airworthiness limitations (AWLs) for fuel tank systems to satisfy Special Federal Aviation Regulation No. 88 requirements. This proposed AD would also require the initial inspection of a certain repetitive AWL inspection to phase in that inspection, and repair if necessary. This proposed AD results from a design review of the fuel tank systems. We are proposing this AD to prevent the potential for ignition sources inside fuel tanks caused by latent failures, alterations, repairs, or maintenance actions, which, in combination with We invite you to submit any relevant written data, views, or arguments regarding this proposed AD. Send your comments to an address listed in the ADDRESSES section. Include the docket number ‘‘FAA–2007–28382; Directorate Identifier 2006–NM–179–AD’’ at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of the proposed AD. We will consider all comments received by the closing date and may amend the proposed AD in light of those comments. We will post all comments we receive, without change, to https:// dms.dot.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact with FAA personnel concerning this proposed AD. Using the search function of that Web site, anyone can find and read the comments in any of our dockets, Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Notice of proposed rulemaking (NPRM). 1. The authority citation for 7 CFR part 981 continues to read as follows: VerDate Aug<31>2005 Proposal Number 2 flammable fuel vapors, could result in a fuel tank explosion and consequent loss of the airplane. DATES: We must receive comments on this proposed AD by August 20, 2007. ADDRESSES: Use one of the following addresses to submit comments on this proposed AD. • DOT Docket Web site: Go to https://dms.dot.gov and follow the instructions for sending your comments electronically. • Government-wide rulemaking Web site: Go to https://www.regulations.gov and follow the instructions for sending your comments electronically. • 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. • Fax: (202) 493–2251. • Hand Delivery: Room W12–140 on the ground floor of the West Building, 1200 New Jersey Avenue, SE., Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. Contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124–2207, for the service information identified in this proposed AD. FOR FURTHER INFORMATION CONTACT: Kathrine Rask, Aerospace Engineer, Propulsion Branch, ANM–140S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98057–3356; telephone (425) 917–6505; fax (425) 917–6590. SUPPLEMENTARY INFORMATION: AGENCY: PART 981—ALMONDS GROWN IN CALIFORNIA § 981.43 of receptacle used in the packaging or handling of almonds. 36901 PO 00000 Frm 00002 Fmt 4702 Sfmt 4702 E:\FR\FM\06JYP1.SGM 06JYP1 36902 Federal Register / Vol. 72, No. 129 / Friday, July 6, 2007 / Proposed Rules including the name of the individual who sent the comment (or signed the comment on behalf of an association, business, labor union, etc.). You may review DOT’s complete Privacy Act Statement in the Federal Register published on April 11, 2000 (65 FR 19477–78), or you may visit https:// dms.dot.gov. rmajette on PROD1PC64 with PROPOSALS Examining the Docket You may examine the AD docket on the Internet at https://dms.dot.gov, or in person at the Docket Operations office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The Docket Operations office (telephone (800) 647–5527) is located on the ground floor of the West Building at the DOT street address stated in the ADDRESSES section. Comments will be available in the AD docket shortly after the Docket Management System receives them. Discussion The FAA has examined the underlying safety issues involved in fuel tank explosions on several large transport airplanes, including the adequacy of existing regulations, the service history of airplanes subject to those regulations, and existing maintenance practices for fuel tank systems. As a result of those findings, we issued a regulation titled ‘‘Transport Airplane Fuel Tank System Design Review, Flammability Reduction and Maintenance and Inspection Requirements’’ (67 FR 23086, May 7, 2001). In addition to new airworthiness standards for transport airplanes and new maintenance requirements, this rule included Special Federal Aviation Regulation No. 88 (‘‘SFAR 88,’’ Amendment 21–78, and subsequent Amendments 21–82 and 21–83). Among other actions, SFAR 88 requires certain type design (i.e., type certificate (TC) and supplemental type certificate (STC)) holders to substantiate that their fuel tank systems can prevent ignition sources in the fuel tanks. This requirement applies to type design holders for large turbine-powered transport airplanes and for subsequent modifications to those airplanes. It requires them to perform design reviews and to develop design changes and maintenance procedures if their designs do not meet the new fuel tank safety standards. As explained in the preamble to the rule, we intended to adopt airworthiness directives to mandate any changes found necessary to address unsafe conditions identified as a result of these reviews. In evaluating these design reviews, we have established four criteria intended VerDate Aug<31>2005 15:25 Jul 05, 2007 Jkt 211001 to define the unsafe conditions associated with fuel tank systems that require corrective actions. The percentage of operating time during which fuel tanks are exposed to flammable conditions is one of these criteria. The other three criteria address the failure types under evaluation: single failures, single failures in combination with another latent condition(s), and in-service failure experience. For all four criteria, the evaluations included consideration of previous actions taken that may mitigate the need for further action. We have determined that the actions identified in this proposed AD are necessary to reduce the potential of ignition sources inside fuel tanks, which, in combination with flammable fuel vapors, could result in a fuel tank explosion and consequent loss of the airplane. Relevant Service Information We have reviewed the following sections of Boeing 727–100/200 Airworthiness Limitations (AWLs), D6– 8766–AWL, original release, dated March 2006 (hereafter referred to as ‘‘Document D6–8766–AWL’’), for Model 727, 727C, 727–100, 727–100C, 727– 200, and 727–200F series airplanes: • Section A, ‘‘SCOPE’’ • Section B, ‘‘FUEL SYSTEMS AIRWORTHINESS LIMITATIONS’’ • Section C, ‘‘SYSTEM AWL PAGE FORMAT’’ • Section D, ‘‘AIRWORTHINESS LIMITATIONS—FUEL SYSTEMS’’ Those sections of Document D6–8766– AWL describe new AWLs for fuel tank systems. The new AWLs include: • AWL inspections, which are periodic inspections of certain features for latent failures that could contribute to an ignition source; and • Critical design configuration control limitations (CDCCLs), which are limitation requirements to preserve a critical ignition source prevention feature of the fuel tank system design that is necessary to prevent the occurrence of an unsafe condition. The purpose of a CDCCL is to provide instruction to retain the critical ignition source prevention feature during configuration change that may be caused by alterations, repairs, or maintenance actions. A CDCCL is not a periodic inspection. Accomplishing the actions specified in the service information is intended to adequately address the unsafe condition. PO 00000 Frm 00003 Fmt 4702 Sfmt 4702 FAA’s Determination and Requirements of the Proposed AD We have evaluated all pertinent information and identified an unsafe condition that is likely to exist or develop on other airplanes of this same type design. For this reason, we are proposing this AD, which would require the FAA-approved maintenance program by incorporating the information in Sections A, B, C, and D of Document D6–8766–AWL. This proposed AD would also require the initial inspection of a certain repetitive AWL inspection to phase in that inspection, and repair if necessary. Difference Between Proposed AD and Service Bulletin In most ADs, we adopt a compliance time allowing a specified amount of time after the AD’s effective date. In this case, however, the FAA has already issued regulations that require operators to revise their maintenance/inspection programs to address fuel tank safety issues. The compliance date for these regulations is December 16, 2008. To provide for efficient and coordinated implementation of these regulations and this proposed AD, we are using this same compliance date in this proposed AD, instead of the 18-month compliance time recommended in the service bulletin. Rework Required When Implementing AWLs Into an Existing Fleet The maintenance program revision for the fuel tank systems specified in paragraph (g) of this proposed AD, which involves incorporating the information specified in Document D6– 8766–AWL, would affect how operators maintain their airplanes. After doing that maintenance program revision, operators would need to do any maintenance on the fuel tank system as specified in the CDCCLs. Maintenance done before the maintenance program revision specified in paragraph (g) would not need to be redone in order to comply with paragraph (g). For example, the AWL that requires fuel pumps to be repaired and overhauled per an FAA-approved component maintenance manual (CMM) applies to fuel pumps repaired after the maintenance programs are revised; spare or on-wing fuel pumps do not need to be reworked. For AWLs that require repetitive inspections, the initial inspection interval (threshold) starts from the date the maintenance program revision specified in paragraph (g) is done, except as provided by paragraph (h) of this proposed AD. This proposed AD would require only the maintenance E:\FR\FM\06JYP1.SGM 06JYP1 36903 Federal Register / Vol. 72, No. 129 / Friday, July 6, 2007 / Proposed Rules program revision specified in paragraph (g), and initial inspections specified in paragraph (h). No other fleet-wide inspections need to be done. Changes to Fuel Tank System AWLs Paragraph (g) of this proposed AD would require revising the FAAapproved maintenance program by incorporating certain information specified in Document D6–8766–AWL. Paragraph (g) allows accomplishing the maintenance program revision in accordance with later revisions of the Document D6–8766–AWL as an acceptable method of compliance if they are approved by the Manager, Seattle Aircraft Certification Office (ACO), FAA. Paragraph (h) allows accomplishing the initial inspection and repair in accordance with later revisions of Document D6–8766–AWL as an acceptable method of compliance if they are approved by the Manager, Seattle ACO. In addition, Section B of Document D6–8766–AWL specifies that any deviations from the published AWL instructions, including AWL intervals, must be approved by the Manager, Seattle ACO. Therefore, after the maintenance program revision, any further revision to an AWL or AWL interval should be done as an AWL change, not as an alternative method of compliance (AMOC). For U.S.-registered airplanes, operators must make requests through an appropriate FAA Principal Maintenance Inspector (PMI) or Principal Avionics Inspector (PAI) for approval by the Manager, Seattle ACO. A non-U.S. operator should coordinate changes with its governing regulatory agency. Exceptional Short-Term Extensions Section B of Document D6–8766– AWL has provisions for an exceptional short-term extension of 30 days. An exceptional short-term extension is an increase in an AWL interval that may be needed to cover an uncontrollable or unexpected situation. For U.S.registered airplanes, the FAA PMI or PAI must concur with any exceptional short-term extension before it is used, unless the operator has identified another appropriate procedure with the local regulatory authority. The FAA PMI or PAI may grant the exceptional shortterm extensions described in Section B without consultation with the Manager, Seattle ACO. A non-U.S. operator should coordinate changes with its governing regulatory agency. As explained in Document D6–8766–AWL, exceptional short-term extensions must not be used for fleet AWL extensions. An exceptional short-term extension should not be confused with an operator’s short-term escalation authorization approved in accordance with the Operations Specifications or the operator’s reliability program. Ensuring Compliance With Fuel Tank System AWLs Boeing has revised applicable maintenance manuals and task cards to address AWLs and to include notes about CDCCLs. Operators that do not use Boeing’s revision service should revise their maintenance manuals and task cards to highlight actions tied to CDCCLs to ensure that maintenance personnel are complying with the CDCCLs. Appendix 1 of this proposed AD contains a list of Air Transport Association (ATA) sections for the revised maintenance manuals. Operators might wish to use the appendix as an aid to implement the AWLs. Recording Compliance With Fuel Tank System AWLs The applicable operating rules of the Federal Aviation Regulations (14 CFR parts 91, 121, 125, and 129) require operators to maintain records with the identification of the current inspection status of an airplane. Some of the AWLs contained in Section D of Document D6–8766–AWL are inspections for which the applicable sections of the operating rules apply. Other AWLs are CDCCLs, which are tied to conditional maintenance actions. An entry into an operator’s existing maintenance record system for corrective action is sufficient for recording compliance with CDCCLs, as long as the applicable maintenance manual and task cards identify actions that are CDCCLs. Changes to CMMs Cited in Fuel Tank System AWLs Some of the AWLs in Section D of Document D6–8766–AWL refer to specific revision levels of the CMMs as additional sources of service information for doing the AWLs. Boeing is referring to the CMMs by revision level in the applicable AWL for certain components rather than including information directly in Document D6– 8766–AWL because of the volume of that information. As a result, the Manager, Seattle ACO, must approve the CMMs. Any later revision of those CMMs will be handled like a change to the AWL itself. Any use of parts (including the use of parts manufacturer approval (PMA) approved parts), methods, techniques, and practices not contained in the CMMs need to be approved by the Manager, Seattle ACO, or governing regulatory authority. For example, pump repair/overhaul manuals must be approved by the Manager, Seattle ACO. Changes to AMMs Referenced in Fuel Tank System AWLs In other AWLs in Section D of Document D6–8766–AWL, the AWLs contain all the necessary data. The applicable section of the maintenance manual is usually included in the AWLs. Boeing intended this information to assist operators in maintaining the maintenance manuals. A maintenance manual change to these tasks may be made without approval by the Manager, Seattle ACO, through an appropriate FAA PMI or PAI, by the governing regulatory authority, or by using the operator’s standard process for revising maintenance manuals. An acceptable change would have to maintain the information specified in the AWL such as the pass/fail criteria or special test equipment. Costs of Compliance There are about 530 airplanes of the affected design in the worldwide fleet. The following table provides the estimated costs, at an average labor rate of $80 per hour, for U.S. operators to comply with this proposed AD. ESTIMATED COSTS rmajette on PROD1PC64 with PROPOSALS Action Work hours Maintenance program revision ................. Inspection .................................................. VerDate Aug<31>2005 15:25 Jul 05, 2007 Jkt 211001 8 8 PO 00000 Cost per airplane Parts None ......................................................... None ......................................................... Frm 00004 Fmt 4702 Sfmt 4702 E:\FR\FM\06JYP1.SGM $640 640 06JYP1 Number of U.S.registered airplanes 272 272 Fleet cost $174,080 174,080 36904 Federal Register / Vol. 72, No. 129 / Friday, July 6, 2007 / Proposed Rules Authority for This Rulemaking Title 49 of the United States Code specifies the FAA’s authority to issue rules on aviation safety. Subtitle I, Section 106, describes the authority of the FAA Administrator. Subtitle VII, Aviation Programs, describes in more detail the scope of the Agency’s authority. We are issuing this rulemaking under the authority described in subtitle VII, part A, subpart III, section 44701, ‘‘General requirements.’’ Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. Regulatory Findings We have determined that this proposed AD would not have federalism implications under Executive Order 13132. This proposed AD would not have a substantial direct effect on the States, on the relationship between the national Government and the States, or on the distribution of power and responsibilities among the various levels of government. For the reasons discussed above, I certify that the proposed regulation: 1. Is not a ‘‘significant regulatory action’’ under Executive Order 12866; 2. Is not a ‘‘significant rule’’ under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and 3. Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. We prepared a regulatory evaluation of the estimated costs to comply with this proposed AD and placed it in the AD docket. See the ADDRESSES section for a location to examine the regulatory evaluation. List of Subjects in 14 CFR Part 39 rmajette on PROD1PC64 with PROPOSALS Air transportation, Aircraft, Aviation safety, Safety. The Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows: VerDate Aug<31>2005 15:25 Jul 05, 2007 Jkt 211001 PART 39—AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 [Amended] 2. The Federal Aviation Administration (FAA) amends § 39.13 by adding the following new airworthiness directive (AD): Boeing: Docket No. FAA–2007–28382; Directorate Identifier 2006–NM–179–AD. Comments Due Date (a) The FAA must receive comments on this AD action by August 20, 2007. Affected ADs (b) None. Initial Inspection and Repair if Necessary Applicability (c) This AD applies to all Boeing Model 727, 727C, 727–100, 727–100C, 727–200, and 727–200F series airplanes, certificated in any category. Note 1: This AD requires revisions to certain operator maintenance documents to include new inspections and maintenance actions. Compliance with these limitations is required by 14 CFR 43.16 and 91.403(c). For airplanes that have been previously modified, altered, or repaired in the areas addressed by these limitations, the operator may not be able to accomplish the actions described in the revisions. In this situation, to comply with 14 CFR 43.16 and 91.403(c), the operator must request approval for revision to the airworthiness limitations in the Boeing 727–100/200 Airworthiness Limitations (AWLs), D6–8766–AWL, according to paragraph (g) or (i) of this AD, as applicable. Unsafe Condition (d) This AD results from a design review of the fuel tank systems. We are issuing this AD to prevent the potential for ignition sources inside fuel tanks caused by latent failures, alterations, repairs, or maintenance actions, which, in combination with flammable fuel vapors, could result in a fuel tank explosion and consequent loss of the airplane. Compliance (e) You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Service Information Reference (f) The term ‘‘Document D6–8766–AWL’’ as used in this AD, means Boeing 727–100/ 200 Airworthiness Limitations (AWLs), D6– 8766–AWL, original release, dated March 2006. Maintenance Program Revision (g) Before December 16, 2008, revise the FAA-approved maintenance program to incorporate the information in the sections specified in paragraphs (g)(1), (g)(2), (g)(3), and (g)(4) of this AD; except that the initial PO 00000 Frm 00005 inspection required by paragraph (h) of this AD must be done at the applicable compliance time specified in that paragraph. Accomplishing the revision in accordance with a later revision of Document D6–8766– AWL is an acceptable method of compliance if the revision is approved by the Manager, Seattle Aircraft Certification Office (ACO), FAA. (1) Section A, ‘‘SCOPE’’ of Document D6– 8766–AWL. (2) Section B, ‘‘FUEL SYSTEMS AIRWORTHINESS LIMITATIONS,’’ of Document D6–8766–AWL. (3) Section C, ‘‘SYSTEM AWL PAGE FORMAT,’’ of Document D6–8766–AWL. (4) Section D, ‘‘AIRWORTHINESS LIMITATIONS—FUEL SYSTEMS,’’ of Document D6–8766–AWL. Fmt 4702 Sfmt 4702 (h) At the later of the compliance times specified in paragraphs (h)(1) and (h)(2) of this AD, do a detailed inspection of the wire bundles routed over the center fuel tank for damaged clamps, wire chafing, and wire bundles in contact with the surface of the center fuel tank, in accordance with AWL Number 28–AWL–01 of Section D of Document D6–8766–AWL. If any discrepancy is found during the inspection, repair the discrepancy before further flight in accordance with AWL Number 28–AWL–01 of Section D of Document D6–8766–AWL. Accomplishing the actions required by this paragraph in accordance with a later revision of Document D6–8766–AWL is an acceptable method of compliance if the revision is approved by the Manager, Seattle ACO. Note 2: For the purposes of this AD, a detailed inspection is: ‘‘An intensive examination of a specific item, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate. Inspection aids such as mirror, magnifying lenses, etc., may be necessary. Surface cleaning and elaborate procedures may be required.’’ (1) Prior to the accumulation of 36,000 total flight hours, or within 120 months since the date of issuance of the original standard airworthiness certification or the date of issuance of the original export certificate of airworthiness, whichever ever occurs first. (2) Within 72 months after the effective date of this AD. Alternative Methods of Compliance (AMOCs) (i)(1) The Manager, Seattle ACO, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19. (2) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. Before using any approved AMOC on any airplane to which the AMOC applies, notify your appropriate principal inspector (PI) in the FAA Flight Standards District Office (FSDO), or lacking a PI, your local FSDO. E:\FR\FM\06JYP1.SGM 06JYP1 Federal Register / Vol. 72, No. 129 / Friday, July 6, 2007 / Proposed Rules 36905 APPENDIX 1.—IMPLEMENTING FUEL TANK SYSTEM AIRWORTHINESS LIMITATIONS ON MODEL 727, 727C, 727–100, 727– 100C, 727–200, 727–200F SERIES AIRPLANES AWL No. ALI/CDCCL ATA section or CMM document Task title 28–AWL–01 ................. ALI .............................. AMM 28–11–00/601 ........................................ 28–AWL–02 ................. CDCCL ....................... SWPM 20–10–11 ............................................ 28–AWL–03 ................. CDCCL ....................... SWPM 20–10–11 ............................................ External Wires Over the Tank No. 2 Inspection. Wiring Assembly and Installation Configuration. Wiring Assembly and Installation Configuration. 28–AWL–04 ................. CDCCL ....................... 28–AWL–05 ................. CDCCL ....................... 28–AWL–06 ................. CDCCL ....................... CMM 28–41–01, Revision 12; CMM 28–41– 02, Revision 5; CMM 28–41–03, Revision 3; CMM 28–41–06, Revision 8; CMM 28– 41–07, Revision 17; CMM 28–41–08, Revision 9; CMM 28–41–09, Revision 8; CMM 28–41–23, Revision 10; or subsequent revisions. CMM 28–40–03, Revision 5; CMM 28–41–06, Revision 8; or subsequent revisions. SWPM 20–14–12 ............................................ AMM 28–41–21/401 28–AWL–07 ................. CDCCL ....................... AMM 29–11–53/401 ........................................ AMM 29–12–61/401 28–AWL–08 ................. 28–AWL–09 ................. CDCCL. CDCCL ....................... 28–AWL–10 ................. 28–AWL–11 ................. CDCCL ....................... CDCCL ....................... CMM 28–20–1, Revision 7; CMM 28–20–5, Revision 6; CMM 28–20–06, Revision 6; or subsequent revisions. AMM 28–22–21/401 ........................................ AMM 28–21–93/401 ........................................ AMM 28–21–93/401 28–AWL–12 ................. CDCCL ....................... AMM 28–11–21/401 ........................................ 28–AWL–13 ................. CDCCL ....................... AMM 28–11–21/401 ........................................ 28–AWL–14 ................. 28–AWL–15 ................. CDCCL ....................... CDCCL ....................... AMM 28–13–11/401 AMM 28–22–21/601 ........................................ AMM 28–22–00/101 ........................................ Issued in Renton, Washington, on June 22, 2007. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E7–13115 Filed 7–5–07; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2007–28436; Directorate Identifier 2007–CE–055–AD] rmajette on PROD1PC64 with PROPOSALS RIN 2120–AA64 15:25 Jul 05, 2007 Jkt 211001 To prevent cracks developing in the aileron spar adjacent to the inboard hinge attachment * * * We must receive comments on this proposed AD by August 6, 2007. Install Fuel Boost Pump. Remove the Auxiliary Tank Fueling Float Switch. Install the Auxiliary Tank Fueling Float Switch. Removal/Installation Cast Fuel Tank Access Panels. Removal/Installation Machined Fuel Tank Access Panels. Install the Relief Valve. Fuel Boost Pump—Inspection/Check. Engine Fuel Feed System—Trouble Shooting. • DOT Docket Web Site: Go to https://dms.dot.gov and follow the instructions for sending your comments electronically. • 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: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue, SE., Washington, DC 20590, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. • Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments. DATES: Federal Aviation Administration (FAA), Department of Transportation (DOT). VerDate Aug<31>2005 SUMMARY: We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI. Airworthiness Directives; Pacific Aerospace Limited Model 750XL Airplanes AGENCY: Notice of proposed rulemaking (NPRM). ACTION: Repair of Fuel Quantity Indicator System (FQIS) Wire Harness. Remove/Install Fuel Tank Bulkhead (Spar) Receptacle Wire Harness. Install System A Hydraulic Fluid Heat Exchanger. Install System B Hydraulic Fluid Heat Exchanger. Examining the AD Docket You may send comments by any of the following methods: You may examine the AD docket on the Internet at https://dms.dot.gov; or in person at the Docket Management ADDRESSES: PO 00000 Frm 00006 Fmt 4702 Sfmt 4702 E:\FR\FM\06JYP1.SGM 06JYP1

Agencies

[Federal Register Volume 72, Number 129 (Friday, July 6, 2007)]
[Proposed Rules]
[Pages 36901-36905]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E7-13115]

=======================================================================
-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2007-28382; Directorate Identifier 2006-NM-179-AD]
RIN 2120-AA64

Airworthiness Directives; Boeing Model 727 Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for all Boeing Model 727 airplanes. This proposed AD would require
revising the FAA-approved maintenance program by incorporating new
airworthiness limitations (AWLs) for fuel tank systems to satisfy
Special Federal Aviation Regulation No. 88 requirements. This proposed
AD would also require the initial inspection of a certain repetitive
AWL inspection to phase in that inspection, and repair if necessary.
This proposed AD results from a design review of the fuel tank systems.
We are proposing this AD to prevent the potential for ignition sources
inside fuel tanks caused by latent failures, alterations, repairs, or
maintenance actions, which, in combination with flammable fuel vapors,
could result in a fuel tank explosion and consequent loss of the
airplane.

DATES: We must receive comments on this proposed AD by August 20, 2007.

ADDRESSES: Use one of the following addresses to submit comments on
this proposed AD.
DOT Docket Web site: Go to https://dms.dot.gov and follow
the instructions for sending your comments electronically.
Government-wide rulemaking Web site: Go to https://
www.regulations.gov and follow the instructions for sending your
comments electronically.
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.
Fax: (202) 493-2251.
Hand Delivery: Room W12-140 on the ground floor of the
West Building, 1200 New Jersey Avenue, SE., Washington, DC, between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
Contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle,
Washington 98124-2207, for the service information identified in this
proposed AD.

FOR FURTHER INFORMATION CONTACT: Kathrine Rask, Aerospace Engineer,
Propulsion Branch, ANM-140S, FAA, Seattle Aircraft Certification
Office, 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone
(425) 917-6505; fax (425) 917-6590.

SUPPLEMENTARY INFORMATION:

Comments Invited

We invite you to submit any relevant written data, views, or
arguments regarding this proposed AD. Send your comments to an address
listed in the ADDRESSES section. Include the docket number ``FAA-2007-
28382; Directorate Identifier 2006-NM-179-AD'' at the beginning of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of the proposed AD. We will
consider all comments received by the closing date and may amend the
proposed AD in light of those comments.
We will post all comments we receive, without change, to https://
dms.dot.gov, including any personal information you provide. We will
also post a report summarizing each substantive verbal contact with FAA
personnel concerning this proposed AD. Using the search function of
that Web site, anyone can find and read the comments in any of our
dockets,

[[Page 36902]]

including the name of the individual who sent the comment (or signed
the comment on behalf of an association, business, labor union, etc.).
You may review DOT's complete Privacy Act Statement in the Federal
Register published on April 11, 2000 (65 FR 19477-78), or you may visit
https://dms.dot.gov.

Examining the Docket

You may examine the AD docket on the Internet at https://
dms.dot.gov, or in person at the Docket Operations office between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays. The
Docket Operations office (telephone (800) 647-5527) is located on the
ground floor of the West Building at the DOT street address stated in
the ADDRESSES section. Comments will be available in the AD docket
shortly after the Docket Management System receives them.

Discussion

The FAA has examined the underlying safety issues involved in fuel
tank explosions on several large transport airplanes, including the
adequacy of existing regulations, the service history of airplanes
subject to those regulations, and existing maintenance practices for
fuel tank systems. As a result of those findings, we issued a
regulation titled ``Transport Airplane Fuel Tank System Design Review,
Flammability Reduction and Maintenance and Inspection Requirements''
(67 FR 23086, May 7, 2001). In addition to new airworthiness standards
for transport airplanes and new maintenance requirements, this rule
included Special Federal Aviation Regulation No. 88 (``SFAR 88,''
Amendment 21-78, and subsequent Amendments 21-82 and 21-83).
Among other actions, SFAR 88 requires certain type design (i.e.,
type certificate (TC) and supplemental type certificate (STC)) holders
to substantiate that their fuel tank systems can prevent ignition
sources in the fuel tanks. This requirement applies to type design
holders for large turbine-powered transport airplanes and for
subsequent modifications to those airplanes. It requires them to
perform design reviews and to develop design changes and maintenance
procedures if their designs do not meet the new fuel tank safety
standards. As explained in the preamble to the rule, we intended to
adopt airworthiness directives to mandate any changes found necessary
to address unsafe conditions identified as a result of these reviews.
In evaluating these design reviews, we have established four
criteria intended to define the unsafe conditions associated with fuel
tank systems that require corrective actions. The percentage of
operating time during which fuel tanks are exposed to flammable
conditions is one of these criteria. The other three criteria address
the failure types under evaluation: single failures, single failures in
combination with another latent condition(s), and in-service failure
experience. For all four criteria, the evaluations included
consideration of previous actions taken that may mitigate the need for
further action.
We have determined that the actions identified in this proposed AD
are necessary to reduce the potential of ignition sources inside fuel
tanks, which, in combination with flammable fuel vapors, could result
in a fuel tank explosion and consequent loss of the airplane.

Relevant Service Information

We have reviewed the following sections of Boeing 727-100/200
Airworthiness Limitations (AWLs), D6-8766-AWL, original release, dated
March 2006 (hereafter referred to as ``Document D6-8766-AWL''), for
Model 727, 727C, 727-100, 727-100C, 727-200, and 727-200F series
airplanes:
Section A, ``SCOPE''
Section B, ``FUEL SYSTEMS AIRWORTHINESS LIMITATIONS''
Section C, ``SYSTEM AWL PAGE FORMAT''
Section D, ``AIRWORTHINESS LIMITATIONS--FUEL SYSTEMS''
Those sections of Document D6-8766-AWL describe new AWLs for fuel tank
systems. The new AWLs include:
AWL inspections, which are periodic inspections of certain
features for latent failures that could contribute to an ignition
source; and
Critical design configuration control limitations
(CDCCLs), which are limitation requirements to preserve a critical
ignition source prevention feature of the fuel tank system design that
is necessary to prevent the occurrence of an unsafe condition. The
purpose of a CDCCL is to provide instruction to retain the critical
ignition source prevention feature during configuration change that may
be caused by alterations, repairs, or maintenance actions. A CDCCL is
not a periodic inspection.
Accomplishing the actions specified in the service information is
intended to adequately address the unsafe condition.

FAA's Determination and Requirements of the Proposed AD

We have evaluated all pertinent information and identified an
unsafe condition that is likely to exist or develop on other airplanes
of this same type design. For this reason, we are proposing this AD,
which would require the FAA-approved maintenance program by
incorporating the information in Sections A, B, C, and D of Document
D6-8766-AWL. This proposed AD would also require the initial inspection
of a certain repetitive AWL inspection to phase in that inspection, and
repair if necessary.

Difference Between Proposed AD and Service Bulletin

In most ADs, we adopt a compliance time allowing a specified amount
of time after the AD's effective date. In this case, however, the FAA
has already issued regulations that require operators to revise their
maintenance/inspection programs to address fuel tank safety issues. The
compliance date for these regulations is December 16, 2008. To provide
for efficient and coordinated implementation of these regulations and
this proposed AD, we are using this same compliance date in this
proposed AD, instead of the 18-month compliance time recommended in the
service bulletin.

Rework Required When Implementing AWLs Into an Existing Fleet

The maintenance program revision for the fuel tank systems
specified in paragraph (g) of this proposed AD, which involves
incorporating the information specified in Document D6-8766-AWL, would
affect how operators maintain their airplanes. After doing that
maintenance program revision, operators would need to do any
maintenance on the fuel tank system as specified in the CDCCLs.
Maintenance done before the maintenance program revision specified in
paragraph (g) would not need to be redone in order to comply with
paragraph (g). For example, the AWL that requires fuel pumps to be
repaired and overhauled per an FAA-approved component maintenance
manual (CMM) applies to fuel pumps repaired after the maintenance
programs are revised; spare or on-wing fuel pumps do not need to be
reworked. For AWLs that require repetitive inspections, the initial
inspection interval (threshold) starts from the date the maintenance
program revision specified in paragraph (g) is done, except as provided
by paragraph (h) of this proposed AD. This proposed AD would require
only the maintenance

[[Page 36903]]

program revision specified in paragraph (g), and initial inspections
specified in paragraph (h). No other fleet-wide inspections need to be
done.

Changes to Fuel Tank System AWLs

Paragraph (g) of this proposed AD would require revising the FAA-
approved maintenance program by incorporating certain information
specified in Document D6-8766-AWL. Paragraph (g) allows accomplishing
the maintenance program revision in accordance with later revisions of
the Document D6-8766-AWL as an acceptable method of compliance if they
are approved by the Manager, Seattle Aircraft Certification Office
(ACO), FAA. Paragraph (h) allows accomplishing the initial inspection
and repair in accordance with later revisions of Document D6-8766-AWL
as an acceptable method of compliance if they are approved by the
Manager, Seattle ACO. In addition, Section B of Document D6-8766-AWL
specifies that any deviations from the published AWL instructions,
including AWL intervals, must be approved by the Manager, Seattle ACO.
Therefore, after the maintenance program revision, any further revision
to an AWL or AWL interval should be done as an AWL change, not as an
alternative method of compliance (AMOC). For U.S.-registered airplanes,
operators must make requests through an appropriate FAA Principal
Maintenance Inspector (PMI) or Principal Avionics Inspector (PAI) for
approval by the Manager, Seattle ACO. A non-U.S. operator should
coordinate changes with its governing regulatory agency.

Exceptional Short-Term Extensions

Section B of Document D6-8766-AWL has provisions for an exceptional
short-term extension of 30 days. An exceptional short-term extension is
an increase in an AWL interval that may be needed to cover an
uncontrollable or unexpected situation. For U.S.-registered airplanes,
the FAA PMI or PAI must concur with any exceptional short-term
extension before it is used, unless the operator has identified another
appropriate procedure with the local regulatory authority. The FAA PMI
or PAI may grant the exceptional short-term extensions described in
Section B without consultation with the Manager, Seattle ACO. A non-
U.S. operator should coordinate changes with its governing regulatory
agency. As explained in Document D6-8766-AWL, exceptional short-term
extensions must not be used for fleet AWL extensions. An exceptional
short-term extension should not be confused with an operator's short-
term escalation authorization approved in accordance with the
Operations Specifications or the operator's reliability program.

Ensuring Compliance With Fuel Tank System AWLs

Boeing has revised applicable maintenance manuals and task cards to
address AWLs and to include notes about CDCCLs. Operators that do not
use Boeing's revision service should revise their maintenance manuals
and task cards to highlight actions tied to CDCCLs to ensure that
maintenance personnel are complying with the CDCCLs. Appendix 1 of this
proposed AD contains a list of Air Transport Association (ATA) sections
for the revised maintenance manuals. Operators might wish to use the
appendix as an aid to implement the AWLs.

Recording Compliance With Fuel Tank System AWLs

The applicable operating rules of the Federal Aviation Regulations
(14 CFR parts 91, 121, 125, and 129) require operators to maintain
records with the identification of the current inspection status of an
airplane. Some of the AWLs contained in Section D of Document D6-8766-
AWL are inspections for which the applicable sections of the operating
rules apply. Other AWLs are CDCCLs, which are tied to conditional
maintenance actions. An entry into an operator's existing maintenance
record system for corrective action is sufficient for recording
compliance with CDCCLs, as long as the applicable maintenance manual
and task cards identify actions that are CDCCLs.

Changes to CMMs Cited in Fuel Tank System AWLs

Some of the AWLs in Section D of Document D6-8766-AWL refer to
specific revision levels of the CMMs as additional sources of service
information for doing the AWLs. Boeing is referring to the CMMs by
revision level in the applicable AWL for certain components rather than
including information directly in Document D6-8766-AWL because of the
volume of that information. As a result, the Manager, Seattle ACO, must
approve the CMMs. Any later revision of those CMMs will be handled like
a change to the AWL itself. Any use of parts (including the use of
parts manufacturer approval (PMA) approved parts), methods, techniques,
and practices not contained in the CMMs need to be approved by the
Manager, Seattle ACO, or governing regulatory authority. For example,
pump repair/overhaul manuals must be approved by the Manager, Seattle
ACO.

Changes to AMMs Referenced in Fuel Tank System AWLs

In other AWLs in Section D of Document D6-8766-AWL, the AWLs
contain all the necessary data. The applicable section of the
maintenance manual is usually included in the AWLs. Boeing intended
this information to assist operators in maintaining the maintenance
manuals. A maintenance manual change to these tasks may be made without
approval by the Manager, Seattle ACO, through an appropriate FAA PMI or
PAI, by the governing regulatory authority, or by using the operator's
standard process for revising maintenance manuals. An acceptable change
would have to maintain the information specified in the AWL such as the
pass/fail criteria or special test equipment.

Costs of Compliance

There are about 530 airplanes of the affected design in the
worldwide fleet. The following table provides the estimated costs, at
an average labor rate of $80 per hour, for U.S. operators to comply
with this proposed AD.

Estimated Costs
----------------------------------------------------------------------------------------------------------------
Number of
Cost per U.S.-
Action Work hours Parts airplane registered Fleet cost
airplanes
----------------------------------------------------------------------------------------------------------------
Maintenance program revision........ 8 None.................. $640 272 $174,080
Inspection.......................... 8 None.................. 640 272 174,080
----------------------------------------------------------------------------------------------------------------

[[Page 36904]]

Authority for This Rulemaking

Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, Section 106, describes the
authority of the FAA Administrator. Subtitle VII, Aviation Programs,
describes in more detail the scope of the Agency's authority.
We are issuing this rulemaking under the authority described in
subtitle VII, part A, subpart III, section 44701, ``General
requirements.'' Under that section, Congress charges the FAA with
promoting safe flight of civil aircraft in air commerce by prescribing
regulations for practices, methods, and procedures the Administrator
finds necessary for safety in air commerce. This regulation is within
the scope of that authority because it addresses an unsafe condition
that is likely to exist or develop on products identified in this
rulemaking action.

Regulatory Findings

We have determined that this proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD would not
have a substantial direct effect on the States, on the relationship
between the national Government and the States, or on the distribution
of power and responsibilities among the various levels of government.
For the reasons discussed above, I certify that the proposed
regulation:
1. Is not a ``significant regulatory action'' under Executive Order
12866;
2. Is not a ``significant rule'' under the DOT Regulatory Policies
and Procedures (44 FR 11034, February 26, 1979); and
3. Will not have a significant economic impact, positive or
negative, on a substantial number of small entities under the criteria
of the Regulatory Flexibility Act.
We prepared a regulatory evaluation of the estimated costs to
comply with this proposed AD and placed it in the AD docket. See the
ADDRESSES section for a location to examine the regulatory evaluation.

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation safety, Safety.

The Proposed Amendment

Accordingly, under the authority delegated to me by the
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

1. The authority citation for part 39 continues to read as follows:

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

Sec. 39.13 [Amended]

2. The Federal Aviation Administration (FAA) amends Sec. 39.13 by
adding the following new airworthiness directive (AD):

Boeing: Docket No. FAA-2007-28382; Directorate Identifier 2006-NM-
179-AD.

Comments Due Date

(a) The FAA must receive comments on this AD action by August
20, 2007.

Affected ADs

(b) None.

Applicability

(c) This AD applies to all Boeing Model 727, 727C, 727-100, 727-
100C, 727-200, and 727-200F series airplanes, certificated in any
category.

Note 1: This AD requires revisions to certain operator
maintenance documents to include new inspections and maintenance
actions. Compliance with these limitations is required by 14 CFR
43.16 and 91.403(c). For airplanes that have been previously
modified, altered, or repaired in the areas addressed by these
limitations, the operator may not be able to accomplish the actions
described in the revisions. In this situation, to comply with 14 CFR
43.16 and 91.403(c), the operator must request approval for revision
to the airworthiness limitations in the Boeing 727-100/200
Airworthiness Limitations (AWLs), D6-8766-AWL, according to
paragraph (g) or (i) of this AD, as applicable.

Unsafe Condition

(d) This AD results from a design review of the fuel tank
systems. We are issuing this AD to prevent the potential for
ignition sources inside fuel tanks caused by latent failures,
alterations, repairs, or maintenance actions, which, in combination
with flammable fuel vapors, could result in a fuel tank explosion
and consequent loss of the airplane.

Compliance

(e) You are responsible for having the actions required by this
AD performed within the compliance times specified, unless the
actions have already been done.

Service Information Reference

(f) The term ``Document D6-8766-AWL'' as used in this AD, means
Boeing 727-100/200 Airworthiness Limitations (AWLs), D6-8766-AWL,
original release, dated March 2006.

Maintenance Program Revision

(g) Before December 16, 2008, revise the FAA-approved
maintenance program to incorporate the information in the sections
specified in paragraphs (g)(1), (g)(2), (g)(3), and (g)(4) of this
AD; except that the initial inspection required by paragraph (h) of
this AD must be done at the applicable compliance time specified in
that paragraph. Accomplishing the revision in accordance with a
later revision of Document D6-8766-AWL is an acceptable method of
compliance if the revision is approved by the Manager, Seattle
Aircraft Certification Office (ACO), FAA.
(1) Section A, ``SCOPE'' of Document D6-8766-AWL.
(2) Section B, ``FUEL SYSTEMS AIRWORTHINESS LIMITATIONS,'' of
Document D6-8766-AWL.
(3) Section C, ``SYSTEM AWL PAGE FORMAT,'' of Document D6-8766-
AWL.
(4) Section D, ``AIRWORTHINESS LIMITATIONS--FUEL SYSTEMS,'' of
Document D6-8766-AWL.

Initial Inspection and Repair if Necessary

(h) At the later of the compliance times specified in paragraphs
(h)(1) and (h)(2) of this AD, do a detailed inspection of the wire
bundles routed over the center fuel tank for damaged clamps, wire
chafing, and wire bundles in contact with the surface of the center
fuel tank, in accordance with AWL Number 28-AWL-01 of Section D of
Document D6-8766-AWL. If any discrepancy is found during the
inspection, repair the discrepancy before further flight in
accordance with AWL Number 28-AWL-01 of Section D of Document D6-
8766-AWL. Accomplishing the actions required by this paragraph in
accordance with a later revision of Document D6-8766-AWL is an
acceptable method of compliance if the revision is approved by the
Manager, Seattle ACO.

Note 2: For the purposes of this AD, a detailed inspection is:
``An intensive examination of a specific item, installation, or
assembly to detect damage, failure, or irregularity. Available
lighting is normally supplemented with a direct source of good
lighting at an intensity deemed appropriate. Inspection aids such as
mirror, magnifying lenses, etc., may be necessary. Surface cleaning
and elaborate procedures may be required.''

(1) Prior to the accumulation of 36,000 total flight hours, or
within 120 months since the date of issuance of the original
standard airworthiness certification or the date of issuance of the
original export certificate of airworthiness, whichever ever occurs
first.
(2) Within 72 months after the effective date of this AD.

Alternative Methods of Compliance (AMOCs)

(i)(1) The Manager, Seattle ACO, has the authority to approve
AMOCs for this AD, if requested in accordance with the procedures
found in 14 CFR 39.19.
(2) To request a different method of compliance or a different
compliance time for this AD, follow the procedures in 14 CFR 39.19.
Before using any approved AMOC on any airplane to which the AMOC
applies, notify your appropriate principal inspector (PI) in the FAA
Flight Standards District Office (FSDO), or lacking a PI, your local
FSDO.

[[Page 36905]]

Appendix 1.--Implementing Fuel Tank System Airworthiness Limitations on Model 727, 727C, 727-100, 727-100C, 727-
200, 727-200F Series Airplanes
----------------------------------------------------------------------------------------------------------------
ATA section or CMM
AWL No. ALI/CDCCL document Task title
----------------------------------------------------------------------------------------------------------------
28-AWL-01......................... ALI.................. AMM 28-11-00/601.......... External Wires Over the
Tank No. 2 Inspection.
28-AWL-02......................... CDCCL................ SWPM 20-10-11............. Wiring Assembly and
Installation
Configuration.
28-AWL-03......................... CDCCL................ SWPM 20-10-11............. Wiring Assembly and
Installation
Configuration.
28-AWL-04......................... CDCCL................ CMM 28-41-01, Revision 12;
CMM 28-41-02, Revision 5;
CMM 28-41-03, Revision 3;
CMM 28-41-06, Revision 8;
CMM 28-41-07, Revision
17; CMM 28-41-08,
Revision 9; CMM 28-41-09,
Revision 8; CMM 28-41-23,
Revision 10; or
subsequent revisions.
28-AWL-05......................... CDCCL................ CMM 28-40-03, Revision 5;
CMM 28-41-06, Revision 8;
or subsequent revisions.
28-AWL-06......................... CDCCL................ SWPM 20-14-12............. Repair of Fuel Quantity
Indicator System (FQIS)
Wire Harness.
AMM 28-41-21/401 Remove/Install Fuel Tank
Bulkhead (Spar)
Receptacle Wire Harness.
28-AWL-07......................... CDCCL................ AMM 29-11-53/401.......... Install System A
Hydraulic Fluid Heat
Exchanger.
AMM 29-12-61/401 Install System B
Hydraulic Fluid Heat
Exchanger.
28-AWL-08......................... CDCCL................
28-AWL-09......................... CDCCL................ CMM 28-20-1, Revision 7;
CMM 28-20-5, Revision 6;
CMM 28-20-06, Revision 6;
or subsequent revisions.
28-AWL-10......................... CDCCL................ AMM 28-22-21/401.......... Install Fuel Boost Pump.
28-AWL-11......................... CDCCL................ AMM 28-21-93/401.......... Remove the Auxiliary Tank
Fueling Float Switch.
AMM 28-21-93/401 Install the Auxiliary
Tank Fueling Float
Switch.
28-AWL-12......................... CDCCL................ AMM 28-11-21/401.......... Removal/Installation Cast
Fuel Tank Access Panels.
28-AWL-13......................... CDCCL................ AMM 28-11-21/401.......... Removal/Installation
Machined Fuel Tank
Access Panels.
AMM 28-13-11/401 Install the Relief Valve.
28-AWL-14......................... CDCCL................ AMM 28-22-21/601.......... Fuel Boost Pump--
Inspection/Check.
28-AWL-15......................... CDCCL................ AMM 28-22-00/101.......... Engine Fuel Feed System--
Trouble Shooting.
----------------------------------------------------------------------------------------------------------------

Issued in Renton, Washington, on June 22, 2007.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. E7-13115 Filed 7-5-07; 8:45 am]
BILLING CODE 4910-13-P

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.