Alert Extracted From:
AC No. 43-16A
Alert No. 316
November 2004

LYCOMING
Lycoming; Model O-235-L2C; Crankshaft Broke; ATA 8520

The engine crankshaft was found broken in half. There was a lateral break across the throw in front of the middle journal and behind the number 1 and 2 crank pins. The engraved markings on the crankshaft are “W5340 B$ N50, R19119-1, and 91660-1.”

According to the submitter, the lower end of the engine had been overhauled. However, the engine times were not submitted.

A search of the FAA Service Difficulty Reporting System database revealed one report with a separated crankshaft. The submitter also states the engine had experienced two previous propeller strikes.

Part total time: unknown.