AD 2015-04-05
Effective 03/12/2015 · Published 02/25/2015
Airworthiness Directives; Sikorsky Aircraft Corporation (Sikorsky) Helicopters
Summary
We are adopting a new airworthiness directive (AD) for certain Sikorsky Model S-76A, B, C, and D helicopters. This AD requires inspecting the tail rotor drive shaft (TDS) flange-to-shaft attachment hardware for correct assembly and correct torque of the fasteners. If there is a discrepancy, this AD requires, before further flight, applying an index mark to the flange and TDS, inspecting the flange and shaft for a cr…