What was found
FLIGHT CREW REPORTED, ON POWER UP ON TAKEOFF, SPARKS CAME OUT OF OVERHEAD PANEL. ALSO HAD A SMALL AMOUNT OF SMOKE AND SPARKS NEAR AIR CONDITIONING PANEL. MAINTENANCE DEPARTMENT PERSONNEL CORRECTED AS FOLLOWS, REMOVED AND REPLACED BURNED CONNECTOR REF SWPM 20-50-04. REMOVED AND REPLACED DAMAGED CABIN TEMP IND REF AMM 21-62-01. FOUND SEVERAL WIRES DAMAGED GOING TO TERMINAL BLOCK S3-56 AND S3-57. REPAIRED DAMAGED WIRES IAW SWPM 20-10-03, ALL SYSTEMS OPS CHECK OK, AIRCRAFT RETURNED TO SERVICE.