What was found
DURING APPROACH, RECEIVED L/G DOORS NOT CLOSED MESSAGE AFTER LOWERING THE LANDING GEAR. ALSO, THE WHEEL PAGE ON ECAM DISPLAYED ONE RED GEAR TRIANGLE. CYCLED LANDING GEAR HANDLE AND ALL INDICATIONS WERE NORMAL. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED BOTH NOSE LANDING GEAR UPLOCK PROXIMITY SENSORS 18GA AND 19GA, OPERATIONAL CHECK OK.