As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SCHEDULED MAINTENANCE, DAMAGE WAS FOUND CLUTCH SPRING COMPONENT OF THE STARTER ADAPTER CONTACTED THE CRANKSHAFT GEAR HOLD DOWN BOLTS AND SAFETY WIRE USED FOR THESE BOLTS. PIECES OF THE BROKEN SPRING WERE ALSO FOUND IN THE ENGINE OIL PAN. ENGINE WAS REMOVED FROM SERVICE AND REPLACED WITH A NEW ENGINE ASSY.