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 3L INDICATING AS DISARMED IN FLIGHT ON THE ECAM DOOR PAGE WITH THE ARMING LEVER IN THE PROPER ARMED POSITION. THIS DOOR WAS CONFIRMED AS INDICATING PROPERLY ARMED PRIOR TO DEPARTURE ON THE GROUND. MAINTENANCE REPLACED THE L3 DOOR PROXIMITY SWITCH 6WN1 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 52-73-11.