As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 4194 - WHILE TAXIING ON THE RUNWAY IN PREPARATION FOR TAKEOFF, CREW WAS ALERTED BY A NOSE WHEEL STEERING FAIL CAS MESSAGE. DAY MAINTENANCE UNABLE TO CORRECT DISCREPANCY IN CMH. AIRCRAFT WAS FERRIED FROM CMH TO CAK. CAK MAINTENANCE REMOVED AND REPLACED NOSE WHEEL STEERING SERVO VALVE IAW MM 32-51-00. GROUND CHECKED GOOD, AIRCRAFT RETURNED TO SERVICE.