AD 2013-23-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce | plc | Airworthiness Directives; Rolls-Royce plc Turbofan Engines |
Unsafe Condition
Erosion of the leading edge profile of the low-pressure (LP) compressor blade set contributing to fan blade flutter, which could lead to LP compressor blade cracking and uncontained LP compressor blade failures.
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Required Actions
Replace or repair the LP compressor fan blade set based on flight cycles since new (FCSN) or flight cycles since last leading edge profile blade repair (FCSLR). Specific compliance times vary depending on the current FCSN or FCSLR count.
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Compliance Time
Varies based on FCSN or FCSLR count: within 4,000 FCSN or FCSLR, within 250 flight cycles (but not later than 4,500 FCSN or FCSLR), or immediately for engines with 4,400 FCSN or FCSLR or more.
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Affected Aircraft
Rolls-Royce plc RB211 Trent 553-61, 553A2-61, 556-61, 556A2-61, 556B-61, 556B2-61, 560-61, and 560A2-61 turbofan engines.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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