Department of Transportation 2021 – Federal Register Recent Federal Regulation Documents
Results 2,151 - 2,200 of 2,700
Notice of Final Federal Agency Actions on Proposed Highway in California
The FHWA, on behalf of Caltrans, is issuing this notice to announce actions taken by Caltrans that are final. The actions relate to the proposed Dublin BoulevardNorth Canyons Parkway Extension Project (Federal-aid project number RTPL-5432(019)) in the cities of Dublin and Livermore, County of Alameda, State of California. Those actions grant licenses, permits, and approvals for the project.
Notice of Final Federal Agency Actions on Proposed Highway in California
The FHWA, on behalf of Caltrans, is issuing this notice to announce actions taken by Caltrans that relate to a proposed highway project, Binney Junction Underpass (UP) and Marysville UP replacement on State Route 70, in the City of Marysville, in Yuba County, in the State of California. Those actions grant licenses, permits, and approvals for the project.
Proposed Amendment of Class C Airspace and Revocation of Class E Airspace Extension; Fort Lauderdale, FL
This action proposes to reconfigure and expand the Fort Lauderdale-Hollywood International Airport, FL (FLL), Class C airspace area. The FAA is proposing this action to reduce the risk of midair collisions and enhance the efficient management of air traffic operations in the FLL terminal area. Additionally, this action proposes to revoke the Class E airspace extension to the FLL Class C airspace surface area. This proposed action is separate and distinct from the South Florida Metroplex Project. No flight path changes are associated with this proposal.
Airworthiness Directives; Pratt & Whitney Division Turbofan Engines
The FAA is adopting a new airworthiness directive (AD) for certain Pratt & Whitney Division (PW) PW4164, PW4164-1D, PW4168, PW4168-1D, PW4168A, PW4168A-1D, and PW4170 model turbofan engines. This AD was prompted by several reports of low-pressure turbine (LPT) 4th- stage vane cluster assemblies leaning back and notching into the rotating LPT 4th-stage blades, causing some blades to fracture and release. This AD requires initial and repetitive replacements of the LPT 4th-stage air sealing ring segment assemblies with parts eligible for installation. This AD also requires initial and repetitive dimensional inspections of the LPT case for bulging and, depending on the results of the dimensional inspections, repair or replacement of the LPT case. The FAA is issuing this AD to address the unsafe condition on these products.
Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG (Type Certificate Previously Held by Rolls-Royce Deutschland GmbH, Formerly BMW Rolls-Royce GmbH) Turbofan Engines
The FAA proposes to adopt a new airworthiness directive (AD) for certain Rolls-Royce Deutschland Ltd & Co KG (type certificate previously held by Rolls-Royce Deutschland GmbH, formerly BMW Rolls- Royce GmbH) (RRD) BR700-710A2-20 model turbofan engines. This proposed AD was prompted by flight data obtained from airplanes equipped with certain Rockwell Collins avionics and auto-throttle systems that demonstrated significant oscillation of the engine rotor revolution speed during flight. This proposed AD would require initial and repetitive recalculation of the consumed and remaining service life of certain life-limited parts (LLPs). This proposed AD would also require removal of an LLP prior to its approved life limit or within 90 days after the effective date of this AD, whichever occurs later. The FAA is proposing this AD to address the unsafe condition on these products.
Airworthiness Directives; Airbus Helicopters
The FAA is superseding Airworthiness Directive (AD) 82-20-05 for Societe Nationale Industrielle Aerospatiale (now Airbus Helicopters) Model AS-350 and AS-355 series helicopters. AD 82-20-05 required inspecting and establishing a life limit for the tail rotor (TR) drive shaft bearing (bearing). This new AD requires replacing certain part-numbered TR bearings with one part-numbered bearing and repetitively inspecting one part-numbered bearing. This AD was prompted by inconsistencies that have been identified between inspections and maintenance actions required by ADs and inspections and maintenance actions specified in the applicable maintenance manual. The actions of this AD are intended to address an unsafe condition on these products.
Airworthiness Directives; Airbus Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain Airbus Helicopters Model AS332C, AS332C1, AS332L, and AS332L1 helicopters. This AD was prompted by a report that the cabin lateral sliding plug door failed its emergency jettisoning test; subsequent investigation revealed that the jettison handle cable interfered with the cable clamps. This AD requires modifying the release system of each cabin lateral sliding plug door, or modifying the design of the jettison system of each cabin lateral sliding plug door, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
Airworthiness Directives; Sikorsky Aircraft and Sikorsky Aircraft Corporation Helicopters
The FAA is adopting a new airworthiness directive (AD) for Sikorsky Aircraft Model S-61L, S-61N, S-61NM, and S-61R helicopters and Sikorsky Aircraft Corporation Model S-61A, S-61D, S-61E, and S-61V restricted category helicopters. This AD was prompted by the manufacturer determining that there may be arm assemblies in service that have accumulated 15,000 or more hours time-in-service (TIS), which exceeds the service life limit for this component. This AD requires reviewing the mixer unit component log card or equivalent record and, depending on the number of hours TIS, calculating the remaining life of the arm assembly or removing the arm assembly from service. The FAA is issuing this AD to address the unsafe condition on these products.
Airworthiness Directives; Airbus Helicopters Deutschland GmbH (AHD) Helicopters
The FAA proposes to adopt a new airworthiness directive (AD) for all Airbus Helicopters Deutschland GmbH (AHD) Model MBB-BK 117 D-2 helicopters. This proposed AD was prompted by a failed electrical test during production. This proposed AD would require replacing certain wire harness trim connector backshells (backshells), as specified in a European Union Aviation Safety Agency (EASA) AD, which is proposed for incorporation by reference (IBR). This proposed AD would also prohibit installing the affected backshells. The FAA is proposing this AD to address the unsafe condition on these products.
Airworthiness Directives; Leonardo S.p.a. (Type Certificate Previously Held by Agusta S.p.A.) Helicopters
The FAA is superseding Airworthiness Directive (AD) 2017-23-08 for Agusta S.p.A. (now Leonardo S.p.a.) Model AB139 and AW139 helicopters. AD 2017-23-08 required repetitively inspecting the main rotor (M/R) rotating scissors, removing certain lower half scissor spherical bearings (bearings) from service, replacing the removed bearings with a new bearing, and installing a special nut. This new AD retains the requirements of AD 2017-23-08 and requires replacing each affected bearing with a certain part-numbered bearing. This AD was prompted by investigation results determining that a quality control issue may have affected the production of the affected bearings. The actions of this AD are intended to address an unsafe condition on these products.
Airworthiness Directives; Airbus Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain Airbus Helicopters Model EC120B helicopters. This AD was prompted by a report of broken and bent attachment bolts of the main rotor (MR) hub scissors assembly. This AD requires an inspection of the attachment bolts of the MR hub scissors assembly for discrepancies and repair if necessary; part marking of the attachment bolts of the MR hub scissors assembly; and repetitive inspections of the part marking of the attachment bolts, and repair if necessary; as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
Airworthiness Directives; Airbus Helicopters Deutschland GmbH Helicopters
The FAA is superseding Airworthiness Directive (AD) 2017-07-08 for Airbus Helicopters Deutschland GmbH (Airbus Helicopters) Model MBB- BK 117 D-2 helicopters. AD 2017-07-08 required repetitively inspecting each engine mount elastomeric bushing (elastomeric bushing). Since the FAA issued AD 2017-07-08, Airbus Helicopters has designed an improved engine mount metal bushing (metal bushing). This new AD retains the inspection requirements of AD 2017-07-08 and requires replacing each affected engine mount bushing with an improved engine mount bushing, while also requiring repetitive inspections of the improved engine mount bushing. This AD also prohibits installing an elastomeric bushing on any helicopter. The actions of this AD are intended to address an unsafe condition on these products.
Airworthiness Directives; Airbus Helicopters Deutschland GmbH
The FAA is withdrawing a notice of proposed rulemaking (NPRM) that proposed to adopt a new airworthiness directive (AD) that would have applied to certain Airbus Helicopters Deutschland GmbH Model EC135P1, EC135T1, EC135P2, EC135T2, EC135P2+, EC135T2+, EC135P3, and EC135T3 helicopters. The NPRM was prompted by a deviation from a new manufacturing process and a determination that the deviation resulted in a reduced life limit (service life limit) for certain tail rotor (TR) blades. The NPRM would have required a reduced life limit for those TR blades and require a new life limit for certain other TR blades. Since issuance of the NPRM, the FAA has determined that the deviation from the new manufacturing process does not reduce the life limit of certain TR blades and that a new life limit is not needed for certain other blades. Accordingly, the NPRM is withdrawn.
Airworthiness Directives; Airbus Helicopters Deutschland GmbH Helicopters
The FAA proposes to adopt a new airworthiness directive (AD) for all Airbus Helicopters Deutschland GmbH Model MBB-BK 117 D-2 helicopters. This proposed AD was prompted by reports of chafing marks on the wiring harness behind the middle side panels in the area of the front passenger (PAX) panels. This proposed AD would require inspecting, modifying, and rerouting the wiring harness, as specified in a European Union Aviation Safety Agency (EASA) AD, which is proposed for incorporation by reference (IBR). The FAA is proposing this AD to address the unsafe condition on these products.
Airworthiness Directives; The Boeing Company Airplanes
The FAA proposes to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 737-8 and 737-9 airplanes. This proposed AD was prompted by a report that during refueling of the right main tank, if there is a failure of the automatic shutoff system, the refueling panel does not provide the required indication that the automatic shutoff has failed. This proposed AD would require installing a new fuel quantity processor unit (FQPU) and doing a FQPU software check. The FAA is proposing this AD to address the unsafe condition on these products.
Administrative Rulemaking, Guidance, and Enforcement Procedures
This final rule removes the Department's internal policies and procedures relating to the issuance of rulemaking and guidance documents from the Code of Federal Regulations. In addition, this final rule removes regulations concerning the initiation and conduct of enforcement actions, including administrative enforcement proceedings and judicial enforcement actions brought in Federal court.
Airworthiness Directives; Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes
The FAA proposes to adopt a new airworthiness directive (AD) for all Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500- 1A11 airplanes. This proposed AD was prompted by a report of cracking in certain components on left and right sides of the aft wing-to-body fairing (WTBF) structure near the tie-rod attachment at a certain fuselage station; this cracking likely resulted from excessive tie-rod preload. This proposed AD would require inspecting the aft WTBF structure for any cracking or damage, adjusting the load on the two tie-rods at a certain fuselage station, and repair if necessary, as specified in a Transport Canada Civil Aviation (TCCA) AD, which is proposed for incorporation by reference. The FAA is proposing this AD to address the unsafe condition on these products.
Agency Information Collection Activities: Requests for Comments; Clearance of Renewed Approval of Information Collection: Report of Inspections Required by Airworthiness Directive, Part 39
In accordance with the Paperwork Reduction Act of 1995, FAA invites public comments about our intention to request the Office of Management and Budget (OMB) approval to renew an information collection. The collection involves the member of the public that may submit an Alternative Methods of Compliance (AMOC) request to the FAA by using the Airworthiness Directives Development (ADD) External website. The information to be collected will be used to support publicly disseminated information to the FAA and/or is necessary because this information supports the Department of Transpiration's strategic goal to promote the public health and safety by working toward eliminating transportation-related deaths and injuries.
Public Meeting on Railroad Safety Advisory Committee Process
The Federal Railroad Administration (FRA) invites interested persons to participate in a public meeting to discuss recommendations to improve the efficiency and effectiveness of FRA's Railroad Safety Advisory Committee (RSAC). The RSAC is a Federal Advisory Committee that provides a forum for collaborative problem solving of critical safety issues and, as appropriate, develops recommendations for railroad safety regulations through a consensus process.
Agency Information Collection Activities: Requests for Comments; Clearance of Approval of Renewal of Information Collection: Generic Clearance for Customer Interactions
In accordance with the Paperwork Reduction Act of 1995, FAA invites public comments concerning our intention to request the Office of Management and Budget (OMB) approval of a new generic information collection. As part of a Federal Government-wide effort to streamline the process to seek feedback from the public, FAA is requesting approval of a New Generic Information Collection Request: ``Generic Clearance for Customer Interactions''.
Agency Information Collection Activities: Requests for Comments; Clearance of Renewed Approval of Information Collection: Generic Clearance for the Collection of Qualitative Feedback on Agency Service Delivery
In accordance with the Paperwork Reduction Act of 1995, FAA invites public comments about our intention to request the Office of Management and Budget (OMB) approval to renew a generic information collection. As part of a Federal Government-wide effort to streamline the process to seek feedback from the public on service delivery, FAA has an approved Generic Information Collection Request (Generic ICR): ``Generic Clearance for the Collection of Qualitative Feedback on Agency Service Delivery''.
Department Regulatory and Deregulatory Agenda; Semiannual Summary
The Regulatory and Deregulatory Agenda is a semiannual summary of all current and projected rulemakings, reviews of existing regulations, and completed actions of the Department. The intent of the Agenda is to provide the public with information about the Department of Transportation's regulatory activity planned for the next 12 months. It is expected that this information will enable the public to more effectively participate in the Department's regulatory process. The public is also invited to submit comments on any aspect of this Agenda.
Semiannual Regulatory Agenda
The Chairman of the Surface Transportation Board is publishing the Regulatory Flexibility Agenda for fall 2020.
Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes
The FAA is adopting a new airworthiness directive (AD) for all Pilatus Aircraft Ltd. (Pilatus) Model PC-24 airplanes. This AD was prompted by a report that electronic circuit breakers (ECBs) were found in a locked state after maintenance, but before flight. This AD requires revising the airplane flight manual (AFM) to incorporate a procedure to check for the ECB status. The FAA is issuing this AD to address the unsafe condition on these products.
Airworthiness Directives; Gulfstream Aerospace Corporation Airplanes
The FAA is adopting a new airworthiness directive (AD) for all Gulfstream Aerospace Corporation (Gulfstream) Model GV airplanes. This AD was prompted by notification of corrosion present in floor beam support links. This AD requires inspecting the right butt line 6 floor beam inboard support links and bushings for corrosion. The FAA is issuing this AD to address the unsafe condition on these products.
Agency Information Collection Activities: Requests for Comments; Clearance of New Approval of Information Collection: Unmanned Aircraft Systems (UAS) BEYOND and Partnership for Safety Plan (PSP) Programs
In accordance with the Paperwork Reduction Act of 1995, FAA invites public comments about our intention to request the Office of Management and Budget (OMB) approval for a new information collection. The collection involves data and report submissions by State, local and tribal participants in the UAS BEYOND program, and by industry participants in the Partnership for Safety Plan (PSP) program. UAS BEYOND and PSP participants will also conduct qualitative, non- statistical surveys of the general public. The information to be collected will be used to inform FAA policy and decision-making regarding integrating UAS into the National Airspace System.
Airworthiness Directives; Airbus Helicopters Deutschland GmbH (AHD) Helicopters
The FAA proposes to adopt a new airworthiness directive (AD) for Airbus Helicopters Deutschland GmbH (AHD) Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, and EC135T3 helicopters. This proposed AD was prompted by a report of a report of increased control force in the collective axis. This proposed AD would require a one-time visual inspection of the main rotor actuator (MRA), as specified in a European Aviation Safety Agency (now European Union Aviation Safety Agency) (EASA) AD, which is proposed for incorporation by reference (IBR). The FAA is proposing this AD to address the unsafe condition on these products.
Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG (Type Certificate Previously Held by Rolls-Royce plc) Turbofan Engines
The FAA proposes to supersede airworthiness directive (AD) 2020-13-07, which applies to all Rolls-Royce Deutschland Ltd & Co KG (RRD) Trent 1000-D2, Trent 1000-J2, and Trent 1000-K2 model turbofan engines with a certain part-numbered fuel pump installed. AD 2020-13-07 requires removal and replacement of the fuel pump with a part eligible for installation. Since the FAA issued AD 2020-13-07, the manufacturer determined that an additional part-numbered fuel pump is subject to the same unsafe condition identified in AD 2020-13-07. This proposed AD would add an additional part-numbered fuel pump and additional Trent 1000 model turbofan engines to the applicability. This proposed AD would require new and reduced life limits, depending on the engine model, for affected fuel pumps. The FAA is proposing this AD to address the unsafe condition on these products.
Notice of Final Federal Agency Actions on Proposed Highway Projects in Texas
This notice announces actions taken by TxDOT and Federal agencies that are final. The environmental review, consultation, and other actions required by applicable Federal environmental laws for these projects are being, or have been, carried-out by TxDOT pursuant to an assignment agreement executed by FHWA and TxDOT. The actions relate to various proposed highway projects in the State of Texas. These actions grant licenses, permits, and approvals for the projects.
Amendment of V-67, V-190, and V-429; Establishment of T-312; and Revocation of V-125 and V-335 in the Vicinity of Marion, IL
This action amends VHF Omnidirectional Range (VOR) Federal airways V-67, V-190, and V-429; establishes Area Navigation (RNAV) route T-312; and removes VOR Federal airways V-125 and V-335 in the vicinity of Marion, IL. The Air Traffic Service (ATS) route modifications are necessary due to the planned decommissioning of the VOR portion of the Marion, IL, VOR/Distance Measuring Equipment (VOR/ DME) navigation aid (NAVAID). With the exception of the RNAV route T- 312, the Marion VOR/DME NAVAID provides navigation guidance for portions of the affected ATS routes. The VOR is being decommissioned as part of the FAA's VOR Minimum Operational Network (MON) program.
Revocation, Amendment, and Establishment of Multiple Air Traffic Service (ATS) Routes Due to the Decommissioning of the Greene County, MS, VOR
This action withdraws the final rule published in the Federal Register on August 20, 2020, removing Jet Route J-590, amending VHF Omnidirectional Range (VOR) Federal airways V-11 and V-70, and establishing area navigation (RNAV) routes T-362 and T-365 due to the planned decommissioning of the VOR portion of the Greene County, MS, VOR/Tactical Air Navigation (VORTAC) navigation aid. Unanticipated issues affecting the completion of related VOR Minimum Operational Network (MON) Program instrument procedure amendments and the associated flight inspection activities required to adopt those amendments continue and have made this withdrawal action necessary.
Agency Information Collection Activity Under OMB Review
In accordance with the Paperwork Reduction Act of 1995, this notice announces the intention of the Federal Transit Administration (FTA) to request the Office of Management and Budget (OMB) to approve the extension of a currently approved information collection: Survey of FTA Stakeholders.
Federal Motor Vehicle Safety Standards; Child Restraint Systems; Denial of Petition for Rulemaking
This document denies a petition for rulemaking from Jewkes Biomechanics (Jewkes) requesting that NHTSA amend Federal Motor Vehicle Safety Standard (FMVSS) No. 213, ``Child restraint systems,'' to remove a requirement that child restraint systems (CRSs) must meet performance requirements without use of a top tether, or exclude from that requirement a new kind of CRS that the petitioner would like to develop called a ``hybrid CRS.'' Alternatively, the petitioner requests that the definition of a ``harness'' in FMVSS No. 213 be amended to include its hybrid CRS. NHTSA is denying the petition because the requested amendments would unreasonably reduce the child occupant protection provided by FMVSS No. 213.
Airworthiness Directives; Airbus SAS Airplanes
The FAA is adopting a new airworthiness directive (AD) for certain Airbus SAS Model A350-941 and -1041 airplanes. This AD was prompted by reports of migration of the bushings of the horizontal tail plane (HTP) lateral load fittings (LLFs) on the left- and right-hand sides during flight test. This AD requires repetitive inspections for migration of the bushings of the HTP LLFs on the left- and right-hand sides, and terminating repair or modification of any affected bushing, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
Airworthiness Directives; Airbus Helicopters
The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Model AS332L, AS332L1, AS332C, and AS332C1 helicopters. This AD was prompted by the failure of a second stage planet gear installed in the main gearbox (MGB). This AD requires identifying the part number of each second stage planet gear assembly installed in the MGB, replacing an MGB having certain second stage planet gear assembly part numbers with a serviceable MGB, modifying the helicopter by installing a full flow magnetic plug (FFMP), repetitively inspecting the FFMP and the MGB bottom housing and conical housing for metal particles, analyzing any metal particles that are found, and applying corrective actions if necessary, as specified in European Union Aviation Safety Agency (EASA) ADs, which are incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
Airworthiness Directives; Airbus SAS Airplanes
The FAA proposes to adopt a new airworthiness directive (AD) for certain Airbus SAS (Airbus) Model A318 series airplanes; Model A319-111, -112, -113, -114, -115, -131, -132, -133, -151N, and -153N airplanes; Model A320 series airplanes; and Model A321 series airplanes. This proposed AD was prompted by a determination that new or more restrictive airworthiness limitations are necessary. This proposed AD would require revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations, as specified in a European Union Aviation Safety Agency (EASA) AD, which is proposed for incorporation by reference. The FAA is proposing this AD to address the unsafe condition on these products.
Airworthiness Directives; Airbus Helicopters Deutschland GmbH Helicopters
The FAA proposes to adopt a new airworthiness directive (AD) for Airbus Helicopters Deutschland GmbH Model MBB-BK 117 A-1, MBB-BK 117 A-3, MBB-BK 117 A-4, MBB-BK 117 B-1, MBB-BK 117 B-2, and MBB-BK 117 C-1 helicopters. This proposed AD was prompted by an analysis of the main rotor (M/R) blade loop area. This proposed AD would require repetitive inspections of certain M/R blade thimble areas and corrective actions if necessary, as specified in a European Aviation Safety Agency (now European Union Aviation Safety Agency) (EASA) AD, which is proposed for incorporation by reference (IBR). The FAA is proposing this AD to address the unsafe condition on these products.
Airworthiness Directives; Airbus Helicopters Deutschland GmbH (Type Certificate Previously Held by Eurocopter Deutschland GmbH and Eurocopter Canada Ltd.) Helicopters
The FAA is superseding Airworthiness Directive (AD) 97-26-02 for Eurocopter Deutschland GmbH Model BO-105A, BO-105C, BO-105S, BO- 105LS A-1, and BO-105LS A-3 helicopters; and Eurocopter Canada Ltd. Model BO-105LS A-3 helicopters. AD 97-26-02 required a repetitive visual inspection for cracks in the ribbed area of the main rotor (M/R) mast flange (flange), and depending on the outcome, replacing the M/R mast. This new AD retains the requirements of AD 97-26-02 and removes the reinforced M/R mast from the applicability. This AD was prompted by the determination that a certain reinforced M/R mast is not affected by the unsafe condition. The actions of this AD are intended to address an unsafe condition on these products.
Notice of Final Federal Agency Actions on Proposed Highway in Idaho
This notice announces actions taken by the FHWA that are final. The actions relate to a proposed highway project, U.S. 20 at Targhee Pass, specifically the section between its junction with Idaho State Highway 87 and the Montana State line, milepost 402.1 to 406.3 in Fremont County, State of Idaho. The actions grant licenses, permits, and approvals for the project.
IFR Altitudes; Miscellaneous Amendments
This amendment adopts miscellaneous amendments to the required IFR (instrument flight rules) altitudes and changeover points for certain Federal airways, jet routes, or direct routes for which a minimum or maximum en route authorized IFR altitude is prescribed. This regulatory action is needed because of changes occurring in the National Airspace System. These changes are designed to provide for the safe and efficient use of the navigable airspace under instrument conditions in the affected areas.
Special Conditions: The Boeing Company Model 787 Series Airplane; Seats With Pretensioner Restraint Systems
These special conditions are issued for The Boeing Company (Boeing) Model 787 series airplane. This airplane 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 pretensioner restraint systems installed on passenger seats. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. These 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.
Airworthiness Directives; Pratt & Whitney Turbofan Engines
The FAA proposes to supersede Airworthiness Directive (AD) 2019-21-11 and AD 2020-07-02. AD 2019-21-11 applies to all Pratt & Whitney (PW) PW1519G, PW1521G, PW1521G-3, PW1521GA, PW1524G, PW1524G-3, PW1525G, PW1525G-3, PW1919G, PW1921G, PW1922G, PW1923G, and PW1923G-A model turbofan engines. AD 2020-07-02 applies to all PW PW1519G, PW1521G, PW1521G-3, PW1521GA, PW1524G, PW1524G-3, PW1525G, and PW1525G- 3 model turbofan engines. AD 2019-21-11 requires initial and repetitive borescope inspections (BSIs) of the low-pressure compressor (LPC) rotor 1 (R1) and, depending on the results of the inspections, replacement of the LPC. AD 2020-07-02 requires the removal from service of certain electronic engine control (EEC) full authority digital electronic control (FADEC) software and the installation of a software version eligible for installation. Since the FAA issued AD 2019-21-11 and AD 2020-07-02, the manufacturer developed a new version of EEC FADEC software, which terminates the need for repetitive BSIs of the LPC R1. This proposed AD would continue to require repetitive BSIs of certain LPC R1s until replacement of EEC FADEC software with the updated software. This proposed AD would require a BSI after installation of the updated EEC FADEC software if certain Onboard Maintenance Message fault codes are displayed and meet specified criteria. The FAA is proposing this AD to address the unsafe condition on these products.
Airworthiness Directives; The Boeing Company Airplanes
The FAA proposes to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 777 airplanes. This proposed AD was prompted by significant changes, including new or more restrictive requirements, made to the airworthiness limitations (AWLs) and Critical Design Configuration Control Limitations (CDCCLs) related to fuel tank ignition prevention, the engine fuel suction feed system, and the nitrogen generation system. This proposed AD would require revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations. The FAA is proposing this AD to address the unsafe condition on these products.
Airworthiness Directives; Airbus SAS Airplanes
The FAA proposes to adopt a new airworthiness directive (AD) for certain Airbus SAS Model A350-941 and -1041 airplanes. This proposed AD was prompted by a determination that new or more restrictive airworthiness limitations are necessary. This proposed AD would require revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations, as specified in a European Union Aviation Safety Agency (EASA), which is proposed for incorporation by reference. This proposed AD would also require, for certain airplanes, an update of the hydraulic monitoring system to include additional redundancy. The FAA is proposing this AD to address the unsafe condition on these products.
Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes
The FAA proposes to adopt a new airworthiness directive (AD) for certain Pilatus Aircraft Ltd. (Pilatus) Model PC-24 airplanes. 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 identifies the unsafe condition as the engine attachment hardware not conforming to the approved design, which could affect the structural integrity of the airplane. This proposed AD would require inspecting the engine attachment hardware for missing washers and loose nuts and taking corrective actions as necessary. The FAA is proposing this AD to address the unsafe condition on these products.
Airworthiness Directives; Various Restricted Category Helicopters
The FAA proposes to adopt a new airworthiness directive (AD) for type certificated Model UH-1H restricted category helicopters. This proposed AD was prompted by multiple reports of failure of the main driveshaft. This proposed AD would require establishing a life limit for certain main driveshafts, and a one-time and repetitive inspections of the main driveshafts. The FAA is proposing this AD to address the unsafe condition on these products.
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