As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAGNETO CAUSED INTERMITTENT PROBLEMS FOR PILOT OVER THE 12 FLIGHT HOURS PRECEDING THE PARTS REMOVAL. PILOT REPORTED AN IN FLIGHT MAGENTO FAILURE. LANDED AND MAGNETO BEGAN WORKING AGAIN. REPAIR STATION FOUND CONTACTOR TANG ON DISTRIBUTOR GEAR LOOSE AND SPINNING ON GEAR SHAFT. INSTALLED AN NEW DISTRIBUTOR GEAR ASSY AND ACFT APPROBED FOR RETURN TO SERVICE. T