AD 2005-20-23
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce | plc RB211 Trent 875 | Airworthiness Directives; Rolls-Royce plc RB211 Trent 875, 877, 884, 884B, 892, 892B, and 895 Series Turbofan Engines |
Unsafe Condition
Discovery of dry film lubricant (DFL) condition appearing worse than anticipated on fan blades fitted to disks previously run for a significant period. This could lead to LPC fan blade loss, resulting in an uncontained engine failure and possible aircraft damage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Apply an approved dry film lubricant (DFL) to low pressure compressor (LPC) fan blade roots at specified intervals based on cycles-since-new (CSN), cycles-since-last DFL application, or cycles-in-service (CIS). Refer to RR Alert Service Bulletin No. RB.211-72-AD347 for application details.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within specified cycles or compliance times as outlined in the AD, depending on fan blade part number and removal history.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Rolls-Royce plc RB211 Trent 875, 877, 884, 884B, 892, 892B, and 895 series turbofan engines with LPC fan blade part numbers FK 30838, FK30840, FK30842, FW12960, FW12961, FW12962, FW13175, FW18548, or FW23552. These engines are installed on, but not limited to, Boeing 777 series airplanes.
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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