What was found
PHX - AIR TURNBACK - AFTER TAKEOFF ON LANDING GEAR RETRACTION THE NOSE GEAR DID NOT RETRACT; ECAM MESSAGE L/G DOOR NOT UPLOCKED/NOSE GEAR SHOCK ABSORBER FAULT; AFTER CYCLING GEAR DOWN CREW HAD 3 GREEN INDICATION; CREW TRIED CYCLING THE GEAR AGAIN PER MAINTENANCE INSTRUCTION WITH THE SAME RESULT; THE CREW PUT THE GEAR DOWN AND LANDED UNEVENTFULLY WITH 3 GREEN INDICATION - LINK ASSY, PROX SENSOR. MAINTENANCE FOUND POST FLIGHT FAULT 39GA SENSOR, WHICH THEY REPLACED; THEY ALSO PERFORMED A VISUAL INSPECTION OF THE NOSE LANDING GEAR AND FOUND THE NLG EXTEND PROX SENSOR TARGET LINKS WORN, WHICH THEY REPLACED.