What was found
CLIMBING THRU FL 280, RECEIVED A MAIN DECK DOOR SWITCH FAULT WARNING AND MAIN DECK DOOR NOT CLOSED. WARNING WENT OUT AT 14,000 DURING DESCENT. PERFORMED VISUAL INSP, MAIN CARGO DOOR CLOSED AND LOCKED. PERFORMED DOOR WARNING TEST IAW AMM 52-71-00-05-02. OPS CHECKED GOOD. SWITCH 48WS AND 49WS CHECKED WIRING, CONNECTORS AND SWITCH PINS FOR CONDITION. CHECKED GOOD. CHECKED SWITCH RIG PER AMM 52-71-11-05-02. SWITCH RIG WITHIN LIMITS. CREW DEBRIEF, INDICATION WAS NORMAL FOR FLT DURATION.