As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TYS AT TAKEOFF THE LANDING GEAR/GROUND FAIL MESSAGE INDICATOR CAME ON. CREW RETURNED AND MAINTENANCE REMOVED AND REPLACED THE NLG WOW PROXIMITY SWITCH AND THEN ON SECOND ATTEMPT THE SWITCH HAD TO BE ADJUSTED TO THE TARGET. THE OPS CHECK WERE GOOD IAW EMB 135MM 32-63-05. AIRCRAFT WAS RELEASED.