As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) MAGNETO HAD 125 HOURS SINCE LAST 500 HOUR INSPECTION, AT WHICH TIME IMPULSE COUPLING WS WITHIN SPECS AS CALLED OUT IN SLICK MAINTENANCE AND OVERHAUL MANUAL. DURING END RUN FOR 50 HOUR A/C INSPECTION, R/H MAG FOUND DEAD. DURING INSPECTION, FOUND MAG LYING ON TOP OF ENGINE WITH BUSTED MOUNTING FLANGE. INSPECTION FOUND THAT IMPULSE COUPLING HAD COME APART DURING END RUN - SEIZED MAG THUS BUSTING FLANGE.