Airworthiness Directive · Amendment 39-13213 · Rolls-Royce plc RB211-22B Series Turbofan Engines
Rolls-Royce plc RB211-22B Series Turbofan Engines
This airworthiness directive (AD) is applicable to Rolls-Royce (RR) RB211-22B series turbofan engines with intermediate pressure (IP) compressor stage 6 to 7 rotor shaft assembly part number (P/N) UL37094 installed. These engines are installed on, but not limited to Lockheed Martin L1011 airplanes.
This amendment adopts a new airworthiness directive (AD) that is applicable to Rolls-Royce plc (RR) RB211-22B series turbofan engines with intermediate pressure (IP) compressor stage 6 to 7 rotor shaft assembly part number (P/N) UL37094 installed. This amendment requires removal from service of IP compressor stage 6 to 7 rotor shaft assemblies P/N UL37094 before reaching newly reduced life limits. This amendment is prompted by the discovery of corrosion during inspection and analysis of IP compressor stage 6 to 7 rotor shaft assemblies returned from the field. The actions specified by this AD are intended to prevent corrosion-induced cracking of the IP compressor stage 6 to 7 rotor shaft assembly, resulting in an uncontained engine 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.
Engines
