As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: AFTER TAKEOFF LANDING GEAR INDICATED NOT UP AND LOCKED. FLIGHT CREW FOLLOWED ECAM PROCEDURES AND CYCLED THE GEAR DOWN THEN UP WHICH RESULTED IN THE GEAR INDICATING UP AND LOCKED. MAINTENANCE REPLACED THE RIGHT HAND MAIN LANDING GEAR DOOR PROXIMITY SENSOR 32GA AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.