As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS UPON TAXING ON RWY FOR TAKE OFF NOSE WHEEL STEERING VERY DIFFICULT TO OPERATE AND THEN NOSE WENT OVER CENTER. MAINTENANCE REMOVED AND REPLACED FWD & AFT NOSE WHEEL STEERING BY-PASS AND RELIEF VALVE AND BY-PASS ACTUATING ARM IAW AMM 32-52-05. OPS CHECKED GOOD. NO LEAKS NOTED.