As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SCHEDULED 500-HOUR INSPECTION OF MAGNETO, FOUND DISTRIBUTOR GEARSHAFT AND BLOCK BEARINGS WORN. THIS WEAR HAD ALLOWED BRUSH TO WEAR WHICH CAUSED METAL CONTACT AND WEARING OF THE COIL, THE MAGNETO WAS REPLACED. GEAR AND BLOCK ASSY, PN K-3823. (X)