As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED LOSS OF RIGHT HAND ALTERNATOR ON FINAL APPROACH TO THE AIRPORT. DURING TAXI OPERATIONS TO THE RAMP THE PILOT REPORTED HEARING A "NOISE" FROM THE FRONT OF THE ACFT. UPON REMOVAL OF THE ALTERNATOR FROM THE ENGINE, IT WAS DISCOVERED THAT THE ALTERNATOR SHAFT HAD SHEARED OFF FLUSH WITH THE CASE LOCATED AFT OF THE DRIVE COUPLING.