AD 2012-16-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
| engine | Rolls-Royce | RB211 Trent 800 | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Thermal damage of the thrust reverser (T/R) inner wall on Rolls-Royce RB211 Trent 800 engines, caused by excessive heat downstream of the 8th stage IP8 exhaust ports, which could result in T/R structural failure.
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Required Actions
Replace the bleed valve parts and tubing with new parts and tubing on the left and right engines; install Aero-Engine database (AEDB) software in the airplane information management system (AIMS) hardware.
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Compliance Time
Before further flight
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Affected Aircraft
The Boeing Company Model 777-200 and -300 series airplanes equipped with Rolls-Royce RB211 Trent 800 engines.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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