What was found
CLIMBING THROUGH 5,100 METERS RECEIVED ECAM ALERT. FORWARD CARGO DOOR UNLOCK, PROCEEDED ACCORDING WITH ECAMS SET LANDING ELEVATION AT 10,000 ALERT WENT AWAY AND CAME BACK IN FINAL AGAIN. EXECUTED OVER WEIGHT LANDING IAW QRH. GROUND CHECKED THE FWD CARGO DOOR WAS CLOSED AND LOCKED AND THE FWD CARGO DOOR INDICATION ON ECAM WAS NORMAL. PERFORMED WIRING CHECK IAW FIM52-70-00 AND ASM 52-71-00. FOUND HANDLE LIMIT SWITCH 16WS FAULTY. R & R LIMIT SWITCH IAW AMM 52-71-11-4. PERFORMED DOOR WARNING ADJUSTMENT & TEST IAW AMM 52-71-00-5. ALL SATISFACTORY, ALSO PRESSURIZED ACFT IAW AMM 21-31-00-5 AND EVERYTHING NORMAL. ACFT OK FOR SERVICE.