Airworthiness Directives; Pratt & Whitney JT9D Series Turbofan Engines

Özet

This action withdraws a notice of proposed rulemaking (NPRM) that proposed a new airworthiness directive (AD), applicable to Pratt & Whitney JT9D series turbofan engines. That action would have superseded AD 96-25-10 by adding additional affected turbine exhaust case (TEC) assemblies eligible for modification, and adding an additional TEC modification compliance option. Since the issuance of the NPRM, the Federal Aviation Administration (FAA) determined that any additional TEC assemblies could be installed as a TEC modification compliance option through the alternate method of compliance (AMOC) procedure instead. Accordingly, the proposed rule is withdrawn.