What was found
DURING TAKEOFF, LANDING GEAR WOULD NOT RETRACT, ALSO HAD ECAM FAULT FOR MLG SHOCK ABSORBER. AIRCRAFT RETURNED TO PHX AND LANDED WITHOUT FURTHER INCIDENT. EMERGENCY WAS NOT DECLARED, GEAR WAS DOWN AND LOCKED. MAINTENANCE REMOVED AND REPLACED NR 2 LGCIU AND ALSO SERVICED THE RT MLG SHOCK ABSORBER IAW AIRBUS MM 12-14-32. GEAR SWINGS AND OPERATIONAL CHECKS WERE GOOD. TEAR DOWN REPORT CONFIRMS FAILURE. UNIT FAILED THE INTERFACE BOARD NR 2 TESTS, TRANSDUCER 10, ON THE INTERFACE BOARD NR 2 WAS REPLACED. UNIT WAS REPAIRED AND TESTED IAW CMM 32-31-39 REV. 13.