AD 2012-25-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce | plc | Airworthiness Directives; Rolls-Royce plc Turbofan Engines |
Unsafe Condition
Failure of the HP/IP turbine bearing support oil feed tube outer heat shield due to frettage (chafing) with a fractured outer heat shield, leading to oil leaks and potential HP turbine disc failure and uncontained engine failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Initial and repetitive inspections of the HP/IP turbine bearing support oil feed tube outer heat shield. Installation of a revised HP/IP turbine bearing support structure as terminating action to the repetitive inspections.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 flight hours after the effective date of the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Rolls-Royce plc RB211-Trent 768-60, 772-60, and 772B-60 turbofan engines, specific serial numbers as listed in the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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