AD 2008-24-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce | plc Models RB211 Trent 768-60 | Airworthiness Directives; Rolls-Royce plc Models RB211 Trent 768-60, Trent 772-60, and Trent 772B-60 Turbofan Engines |
Unsafe Condition
Oil ejecting from the HP/IP turbine bearings chamber and igniting, which can cause the IP shaft to fracture, the IP turbine to overspeed, and possible uncontained failure of the engine.
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Required Actions
Perform initial and repetitive borescope inspections of the HP/IP turbine bearing internal oil vent tube, scavenge tube, and tube heat shields for wear and cracking; remove tubes from service if found with any cracks beyond serviceable limits; perform repetitive inspections of the vent flow restrictor for blockage; and replace the HP/IP bearings support with serviceable parts at the next 05 module overhaul, but before May 31, 2010.
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Compliance Time
Before May 31, 2010, for the terminating action of replacing the HP/IP bearings support.
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Affected Aircraft
Rolls-Royce plc Models RB211 Trent 768-60, Trent 772-60, and Trent 772B-60 turbofan engines that have not incorporated Service Bulletin No. RB.211-72-E708, No. RB.211-72-F227, or No. RB.211-72-E965, at original issue or later revision.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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