As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE IMPULSE COUPLING STOP ON LEFT MAG BROKE OFF AND FELL DOWN INTO OIL SUMP. IT MADE THE IMPULSE COUPLING INOPERATIVE FOR STARTING, BUT DID NOT HARM NORMAL OPERATION OF MAG. THE STOP PIECES COULD HAVE DAMAGED ACCESSORY DRIVE GEARS, BUT DID NOT. SUBMITTER RECOMMENDS MAGNAFLUX AT OVERHAUL AND AGAIN AT 1,000 HRS TT.