AD 2013-12-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce | plc | Airworthiness Directives; Rolls-Royce plc Turbofan Engines |
Unsafe Condition
Low-pressure (LP) compressor blade partial airfoil release events have occurred, which could lead to LP compressor blade release with possible consequent loss of the engine nose cowl, under cowl fires, and forward projection of secondary debris, possibly resulting in damage to the airplane and/or injury to persons on the ground.
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Required Actions
Perform a one-time ultrasonic inspection of LP compressor blades that have accumulated more than 2,500 flight cycles (FC) since new or since last inspection using RR NMSB RB.211-72-G702, dated May 23, 2011. Use paragraphs 3.C through 3.H of RR NMSB RB.211-72-G872, Revision 2, dated March 8, 2013, for the inspection. On-wing phased array ultrasonic inspection is permitted without removing the blades from the engine.
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Compliance Time
Within 500 flight cycles or within 10 months after the effective date of this AD, whichever is sooner.
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Affected Aircraft
Rolls-Royce plc model RB211 Trent 768-60, 772-60, and 772B-60 turbofan engines with LP compressor blades that have accumulated more than 2,500 flight cycles since new or since last inspection using RR NMSB RB.211-72-G702, dated May 23, 2011.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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