As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE WHEEL STEERING LOCKS UP INTERMITTENTLY. WORKS FINE AND THEN TILLER LOCKS IN THE LAST POSITION. UNABLE TO TURN LEFT OR RIGHT. FREE CASTERING WORKS OK. AIR RETURN TO DTW. MAINTENANCE INSPECTED AND CLEANED ELECTRICAL CONNECTOR. OPS CHECK GOOD OF STEERING SYSTEM IAW SF340AMM.