As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DURING DESCENT INTO SEA DUE TO THE FLIGHT CREW REPORTING A NOSE WHEEL STEERING ECAM FAULT MESSAGE THAT OCCURRED DURING CRUISE FLIGHT. FLIGHT CREW ACCOMPLISHED ECAM PROCEDURES AND THE AIRCRAFT LANDED SAFELY AT SEA WHERE THE NOSE WHEEL STEERING SYSTEM REGAINED FUNCTIONALITY RESULTING IN THE AIRCRAFT TO TAXI TO THE GATE UNDER ITS OWN POWER.. MAINTENANCE REPLACED THE NOSE WHEEL STEERING SERVO CONTROL PER AMM 32-51-51.