AD 2011-06-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Rolls-Royce plc (RR) RB211-Trent 900 Series Turbofan Engines |
Unsafe Condition
An uncontained engine failure has occurred involving release of high energy debris and resulting in damage to the airplane. Analysis shows that an oil fire in the HP/IP structure cavity may have initiated a sequence leading to rupture of the drive arm of the IP Turbine (IPT) disc and subsequent overspeed and burst of that disc.
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Required Actions
Within 10 flight cycles after the effective date, incorporate software version 10.6 to the Engine Electronic Controller (EEC). Guidance is provided in Rolls-Royce Service Bulletin RB.211-73-AG639. After incorporating software 10.6, do not incorporate any prior software versions to the EEC.
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Compliance Time
Within 10 flight cycles after the effective date
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Affected Aircraft
Rolls-Royce RB211-Trent 970-84, 970B-84, 972-84, 972B-84, 977-84, 977B-84, and 980-84 turbofan engines installed on, but not limited to, Airbus A380 series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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