As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TERMINAL END ON ALTERNATOR GROUND WIRE BROKEN AT ALTERNATOR END. GROUND WIRE MADE CONTACT WITH BATTERY LUG OF ALTERNATOR CAUSING CHARGING SYSTEM TO OVER VOLTAGE. OVER VOLTAGE CONDITION TOOK OUT THE TWO KX-155 NAV/COMM. NS25171- BOOTS WOULD HAVE HELPED TO PREVENT THE OVER VOLTAGE CONDITION.