As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING 100 HR INSPECTION FOUND ALTERNATOR MOUNTING BRACKET AND BOLTS WORN CAUSING A VIBRATION WHICH BROKE ALTERNATOR TIGHTENER MOUNTING BOLT AND CRACKED CRANKCASE BOSS AT THIS LOCATION. ALTERNATOR MOUNTING BOLTS AND ALTERNATOR MOUNTING ATTACH HOLES SEVERELY WORN AND FOUND ALTERNATOR LOOSE ON MOUNTING BRACKET.