AD 2005-22-01
Effective 11/10/2005 · Published 10/26/2005
Airworthiness Directives; Sikorsky Aircraft Corporation Model S-76A, B, and C Helicopters
Summary
This amendment adopts a new airworthiness directive (AD) for the Sikorsky Aircraft Corporation (Sikorsky) Model S-76A, B, and C helicopters. This action requires certain inspections of the main rotor lower bifilar arm assembly in the attachment area around the lower bifilar lugs for a crack. If a crack is found on any bifilar lug, this AD requires replacing the bifilar arm assembly with an airworthy bifilar arm asse…