As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) ALTERNATOR FRONT HOUSING CONTAINED FIVE CRACKS AROUND THE FLANGES - ON ENGINE STRIP DOWN (REFER MDR 97/0228) IT WAS FOUND THAT THE COUNTER WEIGHT ROLLERS ON THE CRANKSHAFT HAD EXCESSIVE WEAR AND THE ASSOCIATED VIBRATION IS SUSPECTED TO HAVE BEEN THE CAUSE