As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE ENGINE HAD EXPERIENCE FREQUENT ALTERNATOR BELT THROWING PROBLEMS. NO FIX WAS FOUND. THE DECISION WAS MADE TO HAVE THE ENGINE INSPECTED FOR DEFECTS. FOUND EXCESSIVELY WORN CRANKSHAFT COUNTERWEIGHT BUSHINGS. THIS IS BELIEVED TO BE THE REASON THE ALTERNATOR BELT WOULD NOT OPERATE PROPERLY.