What was found
PHX - LANDING GEAR - AFTER DEPARTING PHX EN ROUTE TO LAS ECAM INDICATED THE LANDING GEAR WAS NOT UP AND LOCKED, FLIGHT CREW CONFIRMED THAT NLG GEAR WAS DOWN BY NOISE LEVEL AND INDICATIONS, RECYCLED THE LANDING GEAR PER ECAM INSTRUCTIONS AND GEAR RETRACTED, PROCEEDED TO LAS AND LANDED WITHOUT FURTHER EVENT. AIRCRAFT WAS MAINTENANCE FERRIED BACK TO PHX AND MAINTENANCE FOUND NLG PROXIMITY SENSORS 24GA & 25GA Z DIMENSIONS EXCEED LIMITS. REMOVED AND REPLACED PROXIMITY SENSOR 24GA IAW AMM 32-31-33, AND ADJUSTED BOTH SENSORS. PERFORMED LANDING GEAR RETRACTION CHECK, NO DEFECTS NOTED.