AD 2003-14-21
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed | Martin Models L-1011 | Airworthiness Directives; Lockheed Martin Models L-1011 Airplanes and Rolls-Royce plc RB211 Series Turbofan Engines |
| engine | Rolls-Royce | plc RB211 Series | Airworthiness Directives; Lockheed Martin Models L-1011 Airplanes and Rolls-Royce plc RB211 Series Turbofan Engines |
Unsafe Condition
Undetected fires originating within the high speed gearbox (HSGB) could breach the HSGB case, resulting in engine damage and increased difficulty in extinguishing a fire. Undetected low pressure (LP) compressor shaft location bearing failure could lead to LP compressor and turbine shaft assembly failure, turbine overspeed, and possible uncontained engine failure.
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Required Actions
Install a revised engine front bearing housing assembly. Install a revised speed probe loom electrical support assembly. Install a low pressure (LP) compressor shaft extreme axial movement detector system. Modify the engine turbine cooling air overheat monitoring panel at the flight engineer/second officer's console and the pilot's caution and warning light panel on the main instrument panel. Install a high speed gearbox (HSGB) overheat detector system into the monitoring system for the engine turbine air temperature.
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Compliance Time
Before further flight
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Affected Aircraft
Lockheed Martin Models L-1011-385 series airplanes with RB211-22B-02 series engines.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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