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Fri, Nov 04, 2011

AD: Rolls-Royce Turbofan Engines

AD NUMBER: 2011-22-03

MANUFACTURER: Rolls-Royce Corporation Turbofan Engines
SUBJECT: Airworthiness Directive 2011-22-03
ACTION: Final rule; request for comments.

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for Rolls-Royce Corporation (RRC) AE 3007A, AE 3007A1/1, AE 3007A1, AE 3007A1/3, AE 3007A1E, AE 3007A1P, and AE 3007A3 turbofan engines. This AD requires initial and repetitive eddy current inspections (ECI) of certain 6th-through-13th stage compressor wheel knife edge seals, and initial and repetitive ECIs of the compressor wheel outer circumference, for cracks.

This AD was prompted by reports of lowcycle fatigue cracks found during shop visits, in the 6th-through-13th stage compressor wheels having chrome-carbide coated or uncoated knife edge seals. The FAA is issuing this AD to prevent uncontained failure of the 6th-through-13th stage compressor wheel, leading to damage to the airplane.

DATES: This AD is effective November 17, 2011.

FMI: AD

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