What was found
FLT 671 JFK-LAX - ON FINAL APPROACH RECEIVED ECAM NOSE WHEEL STEERING FAULT, ON LANDING HAD NO NOSE WHEEL STEERING. MX TROUBLESHOT TO BSCU NR 1 FAULT, REMOVED AND REPLACED BSCU NR 1 POSITION PER AMM 32-42-34, OPS CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE.