AD 2010-16-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Rolls-Royce plc (RR) RB211-Trent 900 Series Turbofan Engines |
Unsafe Condition
Wear, beyond Engine Manual limits, has been identified on the abutment faces of the splines on the Trent 900 Intermediate Pressure (IP) shaft rigid coupling. Wear through of the splines would permit the IP turbine to move rearwards, enabling contact with static turbine components and resulting in loss of engine performance, potential in-flight shutdown, oil migration, and oil fire below the LP turbine discs, leading to loss of LP turbine disc integrity.
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Required Actions
Inspect the IP shaft coupling splines using section 3.A of RR RB211 Trent 900 Series Propulsion Systems Alert Non-Modification Service Bulletin (NMSB) RB.211-72-AG329, Revision 1, before accumulating 400 cycles-since-new or within 15 flight hours, whichever occurs first. Further actions depend on inspection results.
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Compliance Time
Before accumulating 400 cycles-since-new or within 15 flight hours, whichever occurs first.
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Affected Aircraft
Rolls-Royce plc model 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 6, 2026
Rights: U.S. Government Public Domain
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