As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING ACFT INSPECTION IT WAS FOUND THAT THE STARTER WAS MISSING 1 OF 2 BOLTS FROM FRONT COVER. ALSO FOUND SECOND BOLT WAS APPROXIMATELY .2500" OUT OF THE HOUSING EVEN THOUGH THE LOCK TAB WAS STILL INTACT. THIS WAS ALLOWING THE FRONT COVER AND THE DRIVE GEAR TO SLIDE FORWARD AND ALLOW THE GEAR TO CONTACT THE ENGINE STARTER RING GEAR. ON INSPECTION THE THREADS IN THE MISSING BOLT HOLE DID NOT LOOK DAMAGED.