As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING PERFORMANCE OF MAGNETO 500 HOUR INSPECTION, THE ELECTRODE FINGER OF THE DISTRIBUTOR BLOCK WAS OBSERVED LOOSE WITH THE ABILITY TO MIGRATE UP AND DOWN THE SHAFT OF THE DISTRIBUTOR GEAR. THE DISTRIBUTOR CAP WAS OBSERVED WITH GROOVES AND PITTING. PRIOR TO REMOVAL, ACFT ENGINE OPERATION OBSERVED NORMAL.