Airworthiness Directive · Amendment 39-16636 · Rolls-Royce plc (RR) RB211-Trent 900 Series Turbofan Engines
Rolls-Royce plc (RR) RB211-Trent 900 Series Turbofan Engines
This AD applies to RR model RB211-Trent 970-84, 970B-84, 972-84, 972B-84, 977-84, 977B-84, and 980-84 turbofan engines. These engines are installed on, but not limited to, Airbus A380 series airplanes.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Unless already done, do the following actions:
(1) Within 10 flight cycles after the effective date of this AD, incorporate software 10.6 to the EEC.
(2) Guidance on incorporating software 10.6 can be found in Rolls-Royce plc Trent 900 Series Propulsion Systems Alert Service Bulletin (SB) No. RB.211-73-AG639, dated December 3, 2010.
(3) After incorporation of software 10.6, do not incorporate any software version prior to 10.6 to the EEC.
This AD differs from the Mandatory Continuing Airworthiness Information (MCAI) as follows:
(1) MCAI European Aviation Safety Agency (EASA) AD 2010-0262, dated December 13, 2010, requires that after EEC modification of an installed engine as required by that AD, do not intermix with any EEC software standards prior to modification 73-F328 (standard 9.2.1) on that airplane. This AD does not, because there are no U.S. registered airplanes with RB211-Trent 900 engines.
(2) MCAI EASA AD 2010-0262, dated December 13, 2010, states that from the effective date of the AD, no engine may be installed in an airplane unless the engine has incorporated the new software. This AD does not, because there are no U.S. registered airplanes with RB211-Trent 900 engines.
(3) MCAI EASA AD 2010-0262, dated December 13, 2010, allows incorporation of later approved versions of EEC software standards that will include IPTOS functionality. This AD does not. Instead, we prohibit software installation prior to version 10.6.
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
