Airworthiness Directives; Fokker Services B.V. Airplanes
We are adopting a new airworthiness directive (AD) for all Fokker Services B.V. Model F.28 Mark 0070 and 0100 airplanes. This AD was prompted by a report of two cases of heavy (hard to move) aileron control caused by aileron cables stuck in a clump of ice in the wheel bay. This AD requires installing drain tubes on the center wing rear spar. We are issuing this AD to prevent accumulated water near or on the aileron control cables, which could freeze and result in reduced control of the airplane.
Airworthiness Directives; AlliedSignal Inc. and Rajay Inc. Oil Scavenge Pumps
The FAA is withdrawing a notice of proposed rulemaking (NPRM). The NPRM proposed a new airworthiness directive (AD) that had applied to AlliedSignal oil scavenge pumps, part numbers (P/Ns) 101633-01 and - 02 and Rajay Inc. oil scavenge pumps, P/Ns 1025-1 and -2 installed on Continental Motors, Inc. (CMI) IO-470 and TSIO-520 reciprocating engines and on Lycoming Engines, Inc., (Lycoming) IO-360, IO-540, and O-360 reciprocating engines. We have found no service difficulties with these model oil scavenge pumps when installed on the affected engines. Accordingly, we withdraw the proposed rule.
Airworthiness Directives; Pratt & Whitney Division Turbofan Engines
We are adopting a new airworthiness directive (AD) for all Pratt & Whitney Division (PW) PW6122A and PW6124A turbofan engines. This AD requires initial and repetitive borescope inspections (BSIs) of the high-pressure compressor (HPC) 7th stage integrally bladed (IB) rotor aft integral arm for cracks until replacement of the HPC 7th stage IB rotor using non-silver-plated nuts. This AD was prompted by reports of crack finds in the HPC 7th stage IB rotor. We are issuing this AD to prevent HPC 7th stage IB rotor fractures, which could lead to uncontained engine failure and damage to the airplane.
Airworthiness Directives; Pratt & Whitney Canada Corp. Turboshaft Engines
We propose to adopt a new airworthiness directive (AD) for certain Pratt & Whitney Canada Corp. (P&WC) PT6B-37A turboshaft engines. This proposed AD was prompted by reports of incorrect engine torque for PT6B-37A engines. This proposed AD would require initial and repetitive inspections until replacement of the No. 10 bearing, and eventual replacement of the No. 9 bearing, both located in the engine reduction gearbox (RGB) assembly. We are proposing this AD to prevent axial migration of the No. 10 bearing in the engine RGB assembly, which could lead to engine overtorque, failure of the engine, in-flight shutdown, and loss of the rotorcraft.
Air Traffic Procedures Advisory Committee
The FAA is issuing this notice to advise the public that a meeting of the Federal Aviation Administration Air Traffic Procedures Advisory Committee (ATPAC) will be held to review present air traffic control procedures and practices for standardization, revision, clarification, and upgrading of terminology and procedures.