As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: DOOR AFT CARGO ECAM AFTER TAKEOFF CLIMBING THROUGH 12K. INTERRUPTED BACK TO MID ACCOUNT MAINTENANCE, CARGO DOOR LIGHT. FLIGHT DID NOT DECLARE AN EMERGENCY AND WAS NOT OVERWEIGHT FOR LANDING. MAINTENANCE AFT CARGO DOOR PROX SWITCH OPS CHECKED GOOD IAW AMM 52-71-12.