Airworthiness Directive · Amendment 39-17878 · Rolls-Royce plc Turbofan Engines
Rolls-Royce plc Turbofan Engines
This AD applies to all Rolls-Royce plc (RR) RB211 Trent 553-61, 553A2-61, 556-61, 556A2-61, 556B-61, 556B2-61, 560-61, and 560A2-61 turbofan engines.
We are adopting a new airworthiness directive (AD) for all Rolls-Royce plc (RR) RB211 Trent 553-61, 553A2-61, 556-61, 556A2-61, 556B-61, 556B2-61, 560-61, and 560A2-61 turbofan engines. We are issuing this AD to address, through an update to the electronic engine control (EEC) software, multiple risks of uncontained engine failure and damage to the airplane.
(1) After the effective date of this AD, within 3 months or 200 flight cycles, whichever occurs first, modify the engine by removing EEC software, Version L5.6.1 or earlier.
(2) Install EEC software eligible for installation.
After modification of an engine as required by paragraph (e) of this AD, do not install any EEC with a software Version L5.6.1 or earlier into any engine.
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.
