As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE TAXI FOR TAKEOFF, A NOSE WHEEL STEERING FAIL WARNING MESSAGE OCCURRED. THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE INSPECTED AND REPLACED THE HYDRAULIC STEERING CONTROL UNIT, IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 32-51-01. OPERATION AND LEAK CHECKS WERE COMPLIED WITH, AND THE AIRCRAFT WAS RETURNED TO SERVICE.