Federal Aviation Administration October 5, 2023 – Federal Register Recent Federal Regulation Documents

This action amends Class D and Class E surface airspace for Northeast Philadelphia Airport, Philadelphia, PA, by updating the airport's description headers and making editorial changes. This action does not change the airspace boundaries or operating requirements.

The FAA is adopting a new airworthiness directive (AD) for certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500- 1A11 airplanes. This AD was prompted by a report the engine fire extinguishing control and indication system did not illuminate correctly. This AD requires installing a software update to the integrated cockpit control panel (ICCP) remote data concentrator (RDC), as specified in a Transport Canada AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.

The FAA is superseding Airworthiness Directive (AD) 2021-10- 20, which applied to certain ATR-GIE Avions de Transport R[eacute]gional Model ATR42-500 and ATR72-212A airplanes. AD 2021-10-20 required revising the existing aircraft flight manual (AFM) and applicable corresponding operational procedures to update a systems limitation, limiting dispatch with certain equipment inoperative, performing an operational test of a certain contactor and an electrical test of a certain battery toggle switch, and performing corrective actions if necessary. This AD was prompted by new procedures for modifying the wiring and replacing the battery toggle switch that have been developed that would terminate the AD requirements. This AD continues to require certain actions in AD 2021-10-20, and requires modifying the battery toggle switch wiring and replacing the battery toggle switch, and revises the applicability to include additional airplanes, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. This AD also prohibits the installation of affected parts. The FAA is issuing this AD to address the unsafe condition on these products.

The FAA is adopting a new airworthiness directive (AD) for certain Airbus SAS Model A319-151N, -153N and -171N airplanes; Model A320-251N, -252N, -253N, -271N, -272N, and -273N airplanes; and Model A321-251N, -252N, -253N, -271N, -272N, -251NX, -252NX, -253NX, -271NX, and -272NX airplanes. This AD was prompted by a safety review of the airplane fuel system, which identified that the electrical harness routing of the engine low pressure shut off valve (LPSOV) is not adequately protected against uncontained engine rotor failure (UERF). This AD requires modification of the LPSOV electrical harness routing on either the left-hand engine or the right-hand engine, 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.

The FAA proposes to supersede Airworthiness Directive (AD) 2021-17-02, which applies to all ATRGIE Avions de Transport R[eacute]gional Model ATR42-200, -300, and -320 airplanes. AD 2021-17- 02 requires a one-time inspection for discrepancies of the wire bundles between the left- and right-hand angle of attack (AOA) probes and the crew alerting computer, and, depending on findings, applicable corrective actions. AD 2021-17-02 also required for certain airplanes, modifying the captain stick shaker wiring, and for all airplanes, revising the existing aircraft flight manual (AFM) and applicable corresponding operational procedures to incorporate procedures for the stick pusher/shaker. Since the FAA issued AD 2021-17-02, a modification was developed to the affected wiring. This proposed AD would require installing a new AOA power supply unit and revising the existing AFM, 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.

The FAA proposes to adopt a new airworthiness directive (AD) for all Saab AB, Support and Services Model SAAB 2000 airplanes. This proposed AD was prompted by a review of the anti-skid system revealed the possibility of inadvertently connecting the inboard harness to the outboard channel (and vice versa) of the wheel speed transducers in the main landing gear (MLG) wheel axles. This proposed AD would require installing color markings on the harnesses and the wheel axles, to ensure proper installation and connection of the anti-skid harnesses, 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.