Airworthiness Directive · Amendment 39-10762 · Rolls-Royce, plc RB211 Trent 800 Series Turbofan Engines
Rolls-Royce, plc RB211 Trent 800 Series Turbofan Engines
Rolls-Royce, plc (R-R) RB211 Trent 875, RB211 Trent 877, RB211 Trent 884, RB211 Trent 892, and RB211 Trent 892B series turbofan engines, with fan blades, part numbers FK 23750, FK 25975, FK 25548, and FK 26757, installed. These engines are installed on but not limited to Boeing 777 series aircraft.
This amendment adopts a new airworthiness directive (AD) that is applicable to Rolls-Royce, plc RB211 Trent 800 series turbofan engines. This action requires initial and repetitive ultrasonic inspections of fan blade roots for cracks, and replacement, if necessary, with serviceable parts. This amendment is prompted by reports of multiple fan blade root cracks in several factory test engines. The actions specified in this AD are intended to prevent fan blade failure, which could result in multiple fan blade release, uncontained engine failure, and possible damage to the aircraft.
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.
