As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ALTERNATOR P/N 9914777-2 HAD A MAIN BEARING FAIL. THIS IS AN ON CONDITION PART WITH NO INSPECTION OR OVERHAUL LIMITS. ALTERNATOR LASTED ONLY 1615 HOURS BEFORE FAILURE OF THE MAIN BEARING. THE MAIN BEARING CAME APART UNDER NORMAL OPERATING CONDITIONS AND CAUSED THE ALTERNATOR ARMATURE TO THEN DRAG AND COMPOUND THE DAMAGE TO THE INTERNAL OF THE ALTERNATOR. NO DAMAGE NOTED TO ENGINE GEARBOX OR ANY SURROUNDING COMPONENTS. THE L/H ALTERNATOR CONTROLS THE L/H WINDSHIELD HEAT CIRCUIT THROUGH THE PCU, WHEN L/H ALTERNATOR FAILS, L/H WINDSHIELD HEAT FAILS.