What was found
MXP/BOM ATB DUE TO SIDE CARGO DOOR OPEN LIGHT ON: SIDE CARGO DOOR OPEN LIGHT CAME ON DURING TAKEOFF AND REMAINED ON AFTER TAKEOFF. FOUND SECURING PANEL ON LATCH DOOR MECHANISM WITH LOOSE SCREWS. TIGHTENED SCREWS, EXERCISED DOOR AND CHECKED OPERATION, FOUND NORMAL. PERFORMED PRESSURIZATION CHECK IAW MM 21-31-00, ALL NORMAL. AIRCRAFT WAS DEPRESSURIZED AND FUEL DUMPED PRIOR TO LANDING.