AD 2009-18-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Rolls-Royce plc. (RR) RB211 Trent 900 Series Turbofan Engines |
| engine | Rolls-Royce | plc | Airworthiness Directives; Rolls-Royce plc. (RR) RB211 Trent 900 Series Turbofan Engines |
Unsafe Condition
Cracking on some HP Turbine Nozzle Guide Vane (NGV) Convex Surfaces, which may lead to the release of NGV material or blockage of Turbine gas flow, resulting in a risk of fracture to the HP Turbine Blade.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the HPT NGV Convex Surfaces before accumulating 400 total cycles, in accordance with Rolls-Royce RB211-Trent 900 Alert Non Modification Service Bulletin (NMSB) RB.211-72-AF995 Revision 2. If no damage is found, repeat inspections at intervals less than 250 cycles apart. If damage is identified, follow the procedures in the referenced service bulletin.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before accumulating 400 total cycles
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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 that do not incorporate RR modification Service Bulletin (SB) RB.211-72-G025, installed on, but not limited to, Airbus A380 airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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