As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PIC REPORTED ALTERNATOR FAIL MESSAGE APPEARED. PIC MADE UNSCHEDULED LANDING IN HORSESHOE BAY WITHOUT INCIDENT. FOUND ALTERNATOR BELT NO LONGER RIDING ON PULLEY ASSY, DUE TO A BEARING FAILURE LOCATED ON THE PULLEY ASSY. REMOVED AND REPLACED PULLEY ASSY. UPON FURHTER REVIEW OF THE AIRCRAFT THERE WAS NO FURTHER DAMAGE CAUSED BY THE FAILURE. NO INJURIES REPORTED BY CREW.