As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAS - FLT 268 - YYZ TO LAS - AFTER TAKEOFF, RECEIVED ECAM MESSAGE "L/G DOORS NOT LOCKED". CREW RECYCLED THE GEAR AND RECEIVED A SATISFACTORY INDICATION. FLIGHT CONTINUED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED PROXIMITY SENSOR FIN 23GA. OPERATIONALLY CHECKS OK.