What was found
UPON TAKING THE RUNWAY FOR DEPARTURE, CREW NOTICED THAT THE NOSE WHEEL STEERING HAD DISENGAGED. ACFT TAXIED BACK. MX EVALUATION, NWS OPERATIONALLY CHECKED GOOD IAW MM PROCEDURES. ACFT SUBSEQUENTLY OPERATED 8 LEG SEGMENTS WITHOUT FAULT. UPON LANDING, DURING ROLL OUT, NOSE WHEEL STEERING FOUND INOPERATIVE. NWS OPERATIONALLY CHECKED GOOD IAW MFG MM PROCEDURES. IAW FIELD SUPPORT RECOMMENDATIONS, ALL NWS WIRING WAS LOAD TESTED WITH NO FAULT FOUND. NWS COMPUTER WAS REPLACED AS A PRECAUTIONARY MEASURE AS THE MOST LIKELY COMPONENT CAUSE OF THE REPORTED BUT NOT DUPLICATED INOPERATIVE CONDITION.