As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT, THE FLIGHT CREW RECEIVED A NOSE WHEEL STEERING FAULT AND LOSS OF STEERING. MAINT REMOVED AND REPLACED NLG STEERING SERVO CONTROL VALVE IAW AMM 32-51-51 PAGE BREAK 401. UPON COMPLETION OF THE REPAIR IT WAS INSPECTED AND FOUND ACCEPTABLE AND OPERATIONAL CHECKED GOOD. (A)