As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) MAGNETO WAS REMOVED FOR 500 HOUR INSPECTION. UPON REMOVAL, CUSTOMER NOTICED ROTATING MAGNET FELT ROUGH WHEN SPUN BY HAND. WE RECEIVED AND INSPECTED THE MAGNETO AND FOUND END PLAY BETWEEN THE BEARINGS. THE DRIVE END BEARING HAD PITTING AND DAMAGE ON THE BALL BEARINGS AND INNER RACE. BOTH BEARINGS WERE REPLACED AND THE 500 HOUR INSPECTION WAS CARRIED OUT AND THE MAG RETURNED TO SERVICE.