What was found
PHX - EMERGENCY LANDING - C - DURING DESCENT INTO PHX FROM SEA FLIGHT CREW RECEIVED ECAM MESSAGES FOR 3 CLASS 1 FAULTS (1) NR 2 LANDING GEAR CONTROL INTERFACE UNIT (LGCIU) (2) NR 2 BRAKE ANTISKID AND NOSE WHEEL STEERING, (3) LAVATORY/CARGO SMOKE DETECTION. MAINTENANCE CONTROL ADVISED FLIGHT CREW TO RESET CIRCUIT BREAKER WHICH HAD NO EFFECT. EMERGENCY LANDING WAS DECLARED AND AIRCRAFT MADE AN UNEVENTFUL LANDING. MAINTENANCE TROUBLESHOT AND REPLACED THE NR 2 LGCIU IAW AMM 32-31-71-000-001, AND OPERATIONAL CHECKED GOOD IAW 32-69-00-740-001. THE 3-POLE CONTACTOR WAS ALSO REPLACED IAW AMM 24-51-55-000-001.