Airworthiness Directive · Amendment 39-9996 · Boeing Model 777-200 Series Airplanes
Boeing Model 777-200 Series Airplanes
Model 777-200 series airplanes powered by General Electric (GE) 90 engines having serial number 900-104, -105, -106, - 108, -109, -110, or -111; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 777-200 series airplanes. This action requires repetitive visual inspections of the forward mounts of certain engines to detect damaged, missing, or failed parts, and eventual modification of those engines. Accomplishment of this modification terminates the requirement for repetitive inspections. This amendment is prompted by a report indicating that bolts that attach the yoke of the forward mount to the fan case of the engine have failed due to fatigue cracking. The actions specified in this AD are intended to prevent fatigue cracking in these bolts, which could lead to failure of these bolts and consequent separation of the engine from the wing.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
