As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) ALTERNATOR FAILED IN FLIGHT. INVESTIGATION FOUND THE ALTERNATOR HOUSING ASSEMBLY BOLTS LOOSE WITH TWO OF THE BOLTS HAVING COMPLETELY SEPARATED AND LAYING IN THE BOTTOM OF THE ENGINE COWL. REAR BEARING COLLAPSED. INCORRECT TAB WASHERS USED. TAB WASHERS WERE FOR USE ON A 6.35MM (0.25IN) BOLT WHEREAS THE BOLTS USED ONTHE ALTERNATOR WERE 4.762MM (0.185IN). UNAPPROVED PART. PERSONNEL/MAINTENANCE ERROR.