As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE TROUBLESHOOTING, AN AIR DRIVEN GENERATOR FAULT MX FOUND THE ORANGE MAIN FEED WIRE BURNED THOUGH AFT OF THE CONNECTOR P1XC. WIRE ALSO EXHIBITED EVIDENCE OF PITTING CORROSION. INSULATION WAS ALSO FOUND DEGRADED ON ONE OF THE WHITE LEADS. ALL 3 MAIN FEED WIRES XC1A8AWHT, XC2A8BBLUE, XC3A8CORN, THE GROUND WIRE XC51A8N AND THE ADG WERE REPLACED.