As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURN TO FIELD DUE TO NOSE GEAR NOT LOCKED INDICATION. THE SENSOR FAILED. REPLACED NLG UP LOCK ACTUATING SENSOR 12GA AND PERFORMED FUNCTIONAL TEST OF THE NORMAL EXTENSION AND RETRACTION OF THE NOSE LANDING GEAR. OPERATIONS CHECK NORMAL.