Airworthiness Directive · Amendment 39-12473 · General Electric Company GE90 Series Turbofan Engines
General Electric Company GE90 Series Turbofan Engines
General Electric Company (GE) Models GE90-76B, - 77B, -85B, and -90B turbofan engines. These engines are installed on, but not limited to Boeing 777 series airplanes.
This amendment supersedes an existing airworthiness directive (AD), applicable to certain General Electric Company (GE) GE90 series turbofan engines. That AD currently requires inspecting and purging the P3B and Ps3 lines and associated fittings and ports of moisture. This amendment will allow the installation of improved hardware as terminating action to requirements of the AD, and remove the GE90-92B engine model from the AD applicability. This amendment is prompted by the recent FAA approval of redesigned P3B and Ps3 sense lines, and the removal of the GE90-92B engine from the applicability. The actions specified in this AD are intended to prevent corruption of Ps3 signals, which could result in simultaneous loss of thrust control of both engines.
