AD 2011-09-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Rolls-Royce plc (RR) RB211-524 Series and RB211 Trent 500, 700, and 800 Series Turbofan Engines |
Unsafe Condition
During manufacture of HP Compressor Stage 1 and 2 discs with axial dovetail slots, anomalies at the disc post corners have been found. Fatigue crack initiation and subsequent crack propagation at the disc post may result in release of two blades and the disc post, potentially beyond the containment capabilities of the engine casings.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect axial dovetail slots for cracks using fluorescent penetrant inspection (FPI). Clean the disc before inspection to ensure visibility of small cracks. Take follow-on corrective action based on findings.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 1,000 hours-since-new (HSN) or at the first shop visit after accumulating 1,000 HSN, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Rolls-Royce plc RB211-524 Series and RB211 Trent 500, 700, and 800 Series Turbofan Engines, as specified 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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