What was found
CLIMBING THRU FL 280, RECIEVED A MAIN DECK DOOR SWITCH FAULT WARNING AND MAIN DECK DOOR NOT CLOSED WARNING. WENT OUT AT 14,000 ON DESCENT. MAIN CARGO DOOR CLOSED & LOCKED INDICATION ON ECAM DOOR PAGE, INOPERATIVE MAIN CARGO DOOR VISUALLY CHECKED, CLOSED & LOCKED PRIOR TO EACH DEPARTURE." PERFORMED VISUAL INSP/ MAIN CARGO DOOR CLOSED AND LOCKED. NO FURTHER EVENTS. PERFORMED DOOR WARNING TEST IAW AMM 52-71-00-05-02. OPS CHECKED GOOD. ALSO FOR SWITCH 48WS AND 49WS CHECKED WIRING, CONNECTORS AND SWITCH PINS FOR CONDITION. CHECKED GOOD. CHECKED SWITCH RIG IAW AMM 52-71-11-05-02. SWITCH RIG WITHIN LIMITS. INDICATION WAS NORMAL FOR FLT DURATION IAW TSI 52-30/4404.