As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON START, RT ENGINE FAILED TO TURN. MECHANIC FOUND PROP COULD NOT BE TURNED BY HAND EITHER. LATER INSPECTION FOUND CRANKSHAFT LARGE GEAR MISSING TEETH, AND STARTER ADAPTER MISSING TEETH ON DRIVE GEAR. MECHANIC TO REMOVE AND REPLACE ENGINE.