As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT THE NOSE WHEEL STEERING SYS HAD BEEN INTERMITTENT ON A FEW LEGS. ON THIS THIS LAST LEG DURING TAXI OUT FOR TAKEOFF THE STEERING WOULD NOT STAY ENGAGED AFTER RESET & THE CREW RETURNED TO BLOCKS. TROUBLESHOOTING FOUND THE NOSE WHEEL STEERING HARNESS TO BE DEFECTIVE PN 4591009187-007. THE HARNESS WAS REPLACED WITH NEW. FUNCTIONAL CHECKS WERE SATISFACTORY & THE ACFT WAS RETURNED TO SERVICE.