AD 2009-04-18
Effective 05/05/2009 · Published 03/31/2009
Airworthiness Directives; Pratt & Whitney (PW) JT9D-7 Series Turbofan Engines
Summary
The FAA is adopting a new airworthiness directive (AD) for PW models JT9D-7, -7A, -7AH, -7H, -7F, and -7J turbofan engines. This AD requires initial and repetitive borescope inspections of the 2nd stage high-pressure turbine (HPT) rotor and stator assembly. This AD results from an uncontained failure of a 2nd stage HPT rotor disk that caused the engine to separate from the airplane. We are issuing this AD to prevent…