As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MTC WALK AROUND FOUND CHAFED WIRES IN LEFT WHEEL WELL FWD BULKHEAD JUST INBOARD OF WHEEL WELL LT SW. REPLACED LOWER BEACON HARNESS, BEACON OPS OK. WHEN LEFT MLG DOOR WAS LOWERED DURING THE TURN AROUND INSPECTION THE TECH AT THAT TIME NOTICED ARCING FROM THE CABLE HARNESS. REPAIRED WIRING.