As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING SCHEDULED MAINTENANCE, METAL CONTAMINATION WAS FOUND IN THE OIL FILTER. FURTHER INVESTIGATION REVEALED PARTS OF THE ALTERNATOR DRIVE BUSHINGS IN THE OIL SUMP AND THE ALTERNATOR DRIVE COUPLING AND GEAR DESTROYED. THE ENGINE WAS REMOVED AND SENT FOR REPAIR.