As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TROUBLESHOOTING OF ENG 1 AND 2 IGN SYS A CB A3 POPPED FOUND WIRES 5A421B16 AND 5A421W16 CHAFED AND ARCING AGAINST BRACKET ABOVE OIL TANK QUANTITY TRANSMITTER. REFER TO WDM71-51-04 P003 FIG 1. SPLICED IN NEW SECTION OF CABLE FROM BELOW FUEL-OIL COOLER FUEL OUT TUBE TO CONNECTOR 4100 KSD OF RELAY BOX NR 1 ENG. REPAIR ACCOMPLISHED PER AMM70-71-23 AND AMM70-71-24. ACCOMPLISED IGNITION SYS TEST PER AMM74-00-00 AND WDM71-51-04. NO FAULTS.