Summary
The FAA proposes to adopt a new airworthiness directive (AD) for certain Lycoming Engines (formerly Textron Lycoming) AEIO-360, IO- 360, O-360, LIO-360, and LO-360 series reciprocating engines. This proposed AD would require replacing certain crankshafts. This proposed AD results from a report of a crankshaft failure in a Lycoming LO-360-A1H6 reciprocating engine. We are proposing this AD to prevent failure of the crankshaft, which could result in total engine power loss, in- flight engine failure, and possible loss of the aircraft.