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Wed, Dec 14, 2011

AD: Continental Motors, Inc. (CMI) Reciprocating Engines

AD NUMBER: 2011-25-51

MANUFACTURER: Certain Continental Motors, Inc. (CMI) models TSIO-520, TSIO-550-K, TSIOF-550K, and IO-550-N series reciprocating engines.
SUBJECT: Airworthiness Directive 2011-25-51
ACTION: Final rule; request for comments.

SUMMARY: This emergency AD was sent previously to all known U.S. owners and operators of these engines. This AD requires replacing affected CMI starter adapters with starter adapters eligible for installation. This AD was prompted by 5 reports received of fractures in starter adapter shaft gears in certain part number (P/N) CMI starter adapters. The FAA is issuing this AD to prevent failure of the starter adapter gear shaft, leading to an inoperable oil scavenge pump and engine in-flight shutdown.

DATES: This AD is effective December 28, 2011.

FMI: AD

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