What was found
FLIGHT CREW REPORTED R1 DOOR OPEN INDICATION IN FLIGHT. COMPLETED ECAM PROCEDURES. DIVERTED TO IND AND LANDED WITHOUT INCIDENT. PERFORMED OPERATIONAL CHECK OF R1 DOOR PER MM 52-71-00-801. NO DEFECTS NOTED. PLACARD AS PRECAUTIONARY MEASURE PER MM 52-70-01B. PERFORMED OVERWEIGHT LANDING INSPECTION PER WORK CARD MP055104. NO DEFECTS NOTED. VISUALLY CHECKED DOOR WAS CLOSED AND LOCKED AT DEPARTURE. UPON ARRIVAL IN DEN, REPLACED F1 DOOR SLIDE ARMED HANDLE PROXIMITY SWITCH 4WN2 AND R1 DOOR PROXIMITY SWITCH 13WV2 PER MM 52-71-11. OPS CHECKED NORMAL AND PLACARD WAS REMOVED.