What was found
DAY - FLT 046 - AFTER TAKEOFF, GEAR DOOR NOT LATCH LIGHT ILLUMINATED, ABNORMAL CHECK LIST COMPLETED. DOOR NOT LATCH LIGHT REMAINED ILLUMINATED. RETURNED TO DAY, FUEL DUMPED APPROX 4,000 POUNDS. RESECURED CANNON PLUG ON LT MAIN DOOR SWITCH, CYCLED SYSTEM IAW DC-8 MM 32-60-00. OPS CHECK GOOD ON GROUND. (X)