What was found
AFTER TAKEOFF FROM SAN ANTONIO, RETRACTED GEAR. RECEIVED 'LANDING GEAR NO UPLOCKED WITH RED 'UNLOCK' INDICATION ON LANDING GEAR ANNUNCIATOR. REVIEWED COCKPIT PROCEDURE MANUAL AND ACCOMPLISHED ECAM ACTIONS. AFTER UNSUCCESSFUL UPLOCK, GEAR WAS DOWNLOCKED AND AIRCRAFT RETURNED TO SAN ANTONIO WITHOUT INCIDENT. REMOVED AND REPLACED UPLOCK ASSEMBLY FOR NOSE LANDING EAR, 'GEAR NOT LOCKED. OPERATIONAL AND LEAK CHECK NORMAL. (M)