As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE STOPPAGE DUE TO ABNORMALLY HIGH WEAR TO THE LIFTING BLOCKS OF THE CONTACT POINTS OF BOTH THE LT AND RT SIDES OF A COMMON MAGNETO. BOTH CONTACT POINTS WERE REMOVED AND INSPECTED FOR BOGUS PARTS; REINSTALLED, LUBRICATED, RE-GAPPED AND TIMED. THE AIRCRAFT WAS RETURNED TO SERVICE AFTER GROUND RUN. THE MAGNETO HAS 115.5 HOURS SINCE RETURN TO SERVICE. MAGNETO WAS PREVIOUSLY SENT BACK FOR THE SAME ABNORMAL WEAR AFTER 225.6 HOURS IN SERVICE.