AD 2010-17-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Rolls-Royce plc RB211-524C2 Series Turbofan Engines |
| engine | Rolls-Royce | plc RB211-524C2 Series | Airworthiness Directives; Rolls-Royce plc RB211-524C2 Series Turbofan Engines |
Unsafe Condition
Cracking of the low-pressure turbine (LPT) casing reduces the capability of the casing to contain debris in the event of an LPT stage 1 blade failure. Blade failure in an engine featuring a cracked LPT casing may result in release of uncontained high-energy debris.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform a fluorescent penetrant inspection (FPI) before the life of the LPT casing has reached 4,500 cycles-since-new (CSN) or within 4,500 cycles-since-last inspection (CSLI) or within 500 cycles after the effective date of this AD, whichever occurs later. Thereafter, perform an FPI at intervals not exceeding 4,500 CSLI. Remove cracked LPT casings from service before further flight.
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Compliance Time
Within 500 cycles after the effective date of this AD
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Affected Aircraft
Rolls-Royce plc model RB211-524C2-19 and RB211-524C2-B-19 turbofan engines installed on, but not limited to, Boeing 747 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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