As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: 3R DOOR SHOWING NOT ARMED DURING DECENT CHECKS. FLIGHT ATTENDANT CONFIRMED ITS ARMED, BUT NOTED LIGHT FLASHING. MAINTENANCE REPLACED R3 DOOR SLIDE ARMED PROXIMITY SENSOR 6WN2 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 52-73-11.