As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THIS STARTER PINION GEAR FAILED. PIECES OF THE GEAR JAMMED THE STARTER MOTOR AND DAMAGED THE RING GEAR. THIS IS THE SECOND OCCURRENCE OF THIS INCIDENT ON THIS AIRCRAFT. MFG MENTIONED THAT THERE HAS BEEN PROBLEM IN PAST. IN ALL CASES BUT THIS LAST ONE, TEETH HAVE BEEN BROKEN OFF OF THE RING GEAR. THE CURRENT INCIDENT HAS ONLY DAMAGED THE RING GEAR TEETH. (K)