Airworthiness directives › 2005-10-16
AD 2005-10-16 Airworthiness Directives; General Electric (GE) CF6-80E1 Series Turbofan Engines
Applicability*9
This AD applies to all General Electric (GE) CF6-80E1 series turbofan engines with electronic control unit (ECU) part numbers (P/N's) 1799M99P12, 1851M74P05, 1851M80P05, and 1960M84P03 or earlier installed. These (GE) CF6-80E1 series engines are installed on, but not limited to, Airbus Industrie (AI) A330 airplanes.
Compliance
You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done. GE CF6-80E1A4/B Engines (f) For GE CF6-80E1A4/B engines with ECU's that already have software version E.1.N installed, no further action is required. All Other CF6-80E1 Series Turbofan Engines (g) At next ECU exposure, upload improved software version E.1.N. Use the Accomplishment Instructions of either of GE Aircraft Engines CF6-80E1 Service Bulletin (SB) 73-0070, dated June 22, 2004, or SB 73-0070, Revision 01, dated March 21, 2005. (h) For the purposes of this AD, the next ECU exposure is defined as the next removal of the ECU for repair, or the next engine shop visit, whichever occurs sooner. (i) After the effective date of this AD, do not install any ECU that has a software version earlier than E.1.N onto any engine. Alternative Methods of
Unsafe condition
This AD results from an uncommanded engine acceleration event caused by a failure of the ECU digital interface unit (DIU). We are issuing this AD to prevent undetected failure of the ECU DIU, which could result in uncommanded acceleration to the overspeed limit without response to throttle commands. The airplane could then experience asymmetric thrust.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1