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Thu, Sep 15, 2011

AD: Lycoming IO-720-A1B

AD Number: 2011-18-09

MANUFACTURER:Lycoming Engines Model IO-720-A1B Reciprocating Engines
SUBJECT: AD Number 2011-18-09
ACTION: Final rule; request for comments.

SUMMARY: This AD requires a crankshaft inspection for certain parts that may be installed. This AD was prompted by the failure of a crankshaft due to incorrect parts installed. We are issuing this AD to prevent engine crankshaft failure and damage to the airplane.

DATES: This AD is effective September 29, 2011.



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