AD 2009-23-51
Effective 02/19/2010 · Published 02/04/2010
Airworthiness Directives; Sikorsky Aircraft Corporation Model S-92A Helicopters
Summary
This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 2009-23-51, 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 AD requires cleaning and inspecting each main gearbox (MGB) assembly mounting foot pad and rib for a crack and corrosion. If you do not find a crac…