What was found
(CAN) PRIOR TO TAKEOFF ELECTRICAL ARCHING AND ASSOCIATED SMOKE OBSERVED COMING FROM CAPTAINS FORWARD OVERHEAD PANEL LIGHTS FOLLOWED BY CIRCUIT BREAKER FOR MAP LIGHT TRIPPING. ELECTRICAL INSULATION (PART OF CRIMPED WIRE CONNECTOR (LUG) FOR CAPTAINS MAP LIGHT FOUND DETERIORATED, ALLOWING ARCHING TO ROUND. CONNECTOR (AMP CONNECTOR (LUG)) BURNT WIRING REPLACED. NOTE: FLEET MANAGMENT REQUEST ALSO ISSUED, TO CHECK THE REMAINDER OF DC9 FLEET FOR CONDITION OF WIRING AND LUGS IN THE SAME AREA.