As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STARTER MOTOR OVERHAULED. STARTER INSTALLED ON 6-16-98. AFTER 43 HRS, BENDIX DRIVE STUCK IN ENGAGED POSITION AND DESTROYED STARTER MOTOR AND STARTER RING GEAR P/N 72566. PILOT UNAWARE OF PROBLEM UNTIL NEXT RESTART. THIS COULD HAVE CAUSED CATASTROPHIC ENGINE FAILURE.