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.