As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ALTERNATOR FAILED IN FLIGHT. INSPECTION AFTER THE NACELLE DOORS WERE OPENED REVEALED THAT THE FORWARD BOLT, WHICH HOLDS THE ALTERNATOR, BECAME LOOSE AND WAS FOUND BETWEEN THE STARTER AND RING GEAR ASSEMBLY. THE DRIVE BELT WAS OFF AND THE RING GEAR WAS CRACKED. PROP WAS REMOVED AND THE RING GEAR AND DRIVE BELT WERE REPLACED.