As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSP, IN THE AFT EQUIPMENT BAY, THE ENTIRE LENGTH OF THE ABOVE MENTIONED WIRE WAS FOUND BADLY BURNED. 50 PERCENT OF THE WIRE INSULATION HAD BEEN MELTED OFF AND THE SURROUNDING WIRING HAD VISIBLE SCORCH MARKS THIS WIRE WAS USED AS THE GROUND FOR A NR OF WIRES CONNECTED TO THE NR 2 DC STATIC VOLTAGE REGULATOR.