As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE OIL SYS FOUND CONTAMINATED WITH FERROUS METAL. AFTER REMOVING STARTER, GOUGES WERE FOUND IN STARTER NOSE BOWL FROM PINION GEAR. PROPELLER WAS ROTATED THROUGH, REVEALING DAMAGE TO MANY CLUSTER GEAR TEETH, INCLUDING ONE HAVING BEEN BROKEN OFF. THE STARTER PINION GEAR HAS (8) TEETH, WHILE THE MM DESCRIBES A NINE-TOOTH PINION GEAR. THE NOSE BOWL CASTINGS OF THESE (2) STARTERS APPEAR TO HAVE BEEN MFG TO DIFFERENT SPECIFICATIONS.