AD 2015-11-10
Effective 07/14/2015 · Published 06/09/2015
Airworthiness Directives; Sikorsky Aircraft Corporation (Sikorsky) Model Helicopters
Summary
We are adopting a new airworthiness directive (AD) for Sikorsky Model S-92A helicopters. This AD requires installing a main gearbox (MGB) failed pump sensor and vacuum switch wiring, installing an MGB oil auto bypass system, activating Aircraft Management System (AMS) 7.1 software to show a new visual warning, and installing updated enhanced ground proximity warning system (EGPWS) software that includes an aural ann…