As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELECTRICAL FIRE IN LOWER LEFT SIDE OF OVERHEAD LIGHTS CONTROL PANEL CREW SAW AN ELECTRICAL FIRE ON OVERHEAD PANEL. SMOKE AND BURNING ODOR DETECTED. TROUBLESHOOT AND FOUND THE PANEL/FLOOD SWITCH S1 WIRES BURNED. REMOVED AND REPLACED THE LIGHT SWITCH IAW AMM 33-13-00-2, TESTED NORMAL IAW AMM 33-42-00-5, CHECKED NORMAL. REMOVED AND REPLACED THE LEFT LIGHTING CONTROL PANEL ASSY IAW MM 33-13-00-2, INSTALLED THE ORIGINAL LIGHT SWITCH TO THE OLD PANEL. ACFT OK FOR SERVICE.