As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, AND LANDING GEAR RETRACTION, NOSE GEAR INDICATOR REMAINED GREEN ACCOMPANIED BY THE RED UNLOCK LIGHT. CREW FOLLOWED ALL CHECKLISTS AND RETURNED FOR LANDING WITHOUT FURTHER INCIDENT. TROUBLESHOT TO BAD NOSE WHEEL STEERING UNIT REMOVED AND REPLACED NWS UNIT IAW CE-680 M/M CHAPTER 32-50-00. ADJUSTED NWS CABLES IAW MM 32-50-00. TRAVEL CHECKS GOOD, RIGGING AND OPS CHECKED GOOD IAW 32-50-00. RETRACT CENTERING AND LEAK CHECKED GOOD.