What was found
CAPT DOME AND STORM LIGHT WHEN OUT; BURNING SMELL IN COCKPIT ALONG WITH SPARKS APPARENTLY FROM INSTRUMENT PANEL. DE-PLANED PASSENGERS. REMOVED AND REPLACED CAPT'S DOME LIGHT BULB. PERFORMED DVI OF WIRING BEHIND INSTRUMENTS PANEL. NO ABNORMAL CONDITION OR SMELL NOTED. AT THIS TIME REPAIRED WIRE ON CAPT YOKE CHART HOLDER IAW STD PRACTICES JIC NR 20-27-17. WIRES WERE CHAFING POPPING-OUT C/B. PERFORMED OP CK OK AS PER MM NR 33-10-00.