As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB OUT GOT MAIN CARGO DOOR NOT LOCKED. COMPLETED QRH AND RTB CYYC. RELEASED FOR SERVICE. MAIN CARGO DOOR CLOSED & LOCKED INDICATION ON ECAM DOOR PAGE INOP. REMOVED AND REPLACED WARNING SWITCH 49WS IAW AMM 52-71-00-04-02 AND PERFORMED ADJUSTMENT/TEST IAW 52-71-00 P BLOCK 501 WITH NO DEFECTS NOTED AT THIS TIME. OK FOR SERVICE.