As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE A/C HAD A DEFECT WITH THE RT WING LIGHT INOPERATIVE. A NEW LAMP WAS INSTALLED AND IT STILL WOULD NOT WORK. INSPECTION FOUND THE WIRES TO THE TRANSFORMER WITHIN THE LIGHT ASSY HOUSING HAD BEEN ARCING AGAINST THE ASSY STRUCTURE. WIRE INSULATION WAS DAMAGED DUE TO OVERHEAT.