AD 2007-11-05
Effective 06/15/2007 · Published 05/31/2007
Airworthiness Directives; Sikorsky Aircraft Corporation Model S-76A, B, and C Helicopters
Summary
This amendment adopts a new airworthiness directive (AD) for Sikorsky Aircraft Corporation (Sikorsky) Model S-76A, B, and C helicopters. This action requires a one-time ultrasonic inspection of the main rotor shaft assembly (M/R shaft) for cracking. This amendment is prompted by the discovery of cracking that occurred during the manufacturing of certain M/R shafts. The actions specified in this AD are intended to de…