As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SB NR 126, 41.146 HAD NOT BEEN COMPLIED WITH. KNUCKLE PINS BACKED OUT OF THE MASTER ROD, HIT THE CRANKSHAFT AND CAUSED A CATASTROPHIC ENGINE FAILURE. CRANKSHAFT SEIZED AND BROKE JUST AFT OF THE PROPELLER. PROPELLER DEPARTED THE AIRCRAFT AND PILOT WAS FORCED TO MAKE AN EMERGENCY LANDING IN A PLOWED FIELD. (SW15200402816)