As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: L4 DOOR SLIDE NOT SHOWING ARMED DURING CRUISE ON THE DOOR-OXY ECAM PAGE - VERIFIED WITH FLIGHT ATTENDANTS THAT THE SLIDE IS STILL PHYSICALLY ARMED - MAINTENANCE REPLACED THE L4 DOOR DETECTOR PROXIMITY SWITCH 7WN1 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK