What was found
CARGO DOOR WARNING LIGHT CAME ON DURING CLIMB-OUT AT 11,500 FEET MSL. CREW FOLLOWED CHECKLIST PROCEDURES AND RETURNED TO STATION. SUSPECT DOOR CLOSING PROCEDURES, DOOR HARD TO CLOSE, OR DOOR CLICK CLACK OR SWITCH RIGGING. DOOR WAS OPENED AND RECLOSED. FLIGHT CONTINUED WITH NO FURTHER PROBLEM. AIRCRAFT WAS REINSPECTED BY MAINTENANCE UPON RETURN TO MAIN BASE. NO DEFECTS WERE NOTED. (M)