AD 2011-13-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Rolls-Royce plc RB211-Trent 500 Series Turbofan Engines |
| engine | Rolls-Royce | plc RB211-Trent 500 Series | Airworthiness Directives; Rolls-Royce plc RB211-Trent 500 Series Turbofan Engines |
Unsafe Condition
Carbon blockage of the fuel spray nozzles due to carbon formation in the RH fuel manifold assembly, which can lead to thermal distress of the Intermediate Pressure (IP) Turbine Nozzle Guide Vanes and potentially result in uncontained, high energy debris release.
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Required Actions
Inspect and clean or replace the RH fuel manifold assembly, part number FW18706, as part of a cleaning or replacement program developed by Rolls-Royce. Optional part replacement may also be performed.
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Compliance Time
Within a specified timeframe determined by the cleaning or replacement program developed by Rolls-Royce.
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Affected Aircraft
Rolls-Royce plc RB211-Trent 553-61, RB211-Trent 553A2-61, RB211-Trent 556-61, RB211-Trent 556A2-61, RB211-Trent 556B-61, RB211-Trent 556B2-61, RB211-Trent 560-61, and RB211-Trent 560A2-61 turbofan engines with RH fuel manifold assembly, part number FW18706, installed.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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