AD 2009-07-53
Effective 04/27/2009 · Published 04/27/2009
Airworthiness Directives; Sikorsky Aircraft Corporation Model S-92A Helicopters
Summary
This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 2009-07-53, which was sent previously to all known U.S. owners and operators of Sikorsky Aircraft Corporation (Sikorsky) Model S-92A helicopters by individual letters. This amendment is prompted by the failure of 2 main gearbox filter bowl assembly studs (studs) that were found broken during a fatal accident investigat…