Airworthiness Directive · Amendment 39-13350 · Rolls-Royce plc Trent 768-60 and Trent 772-60 Turbofan Engines
Rolls-Royce plc Trent 768-60 and Trent 772-60 Turbofan Engines
This AD applies to Rolls-Royce plc (RR) RB211 Trent 768-60 turbofan engines with serial numbers (SNs) before SN 41056 and RB211 Trent 772-60 turbofan engines with SNs before SN 41056. These engines are installed on, but not limited to, Airbus A330 series airplanes.
The FAA is adopting a new airworthiness directive (AD) for certain Rolls-Royce plc (RR) RB211 Trent 768-60 and Trent 772-60 turbofan engines. This AD requires reworking the low pressure (LP) turbine nozzle vane case, the LP turbine bearing support exhaust case, and the support arm bracket assemblies. This AD is prompted by a report of an LP stage 4 blade failure at the blade shank, resulting in severe radial distortion of the rear flange of the LP turbine case and failure of a number of attaching bolts, resulting in enough flange separation to allow the release of high energy debris. We are issuing this AD to prevent possible uncontained LP turbine case failure and damage to the airplane.
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.
