What was found
DURING CLIMBOUT, AFT CARGO DOOR LIGHT CAME ON F/E PANEL. LIGHT WENT OUT DURING DURING DESCENT AT APPROX 3000FT. ON ARRIVAL, FOUND MAIN DECK CARGO VENT DOORS OPEN. INSPECTED DOOR, NO DEFECTS NOTED TO DOOR OR STRUCTURE. OPS CHECKED NORMAL. AFT CARGO DOOR INSPECTED, AND OPERATED DOOR AND VENT DOORS AND FUNCTIONAL CHECKS NORMAL. PRESSURIZATION CHECKS ACCOMPLISHED AND ALL NORMAL AND DOOR LIGHT INDICATIONS OK.