As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW RECEIVED A GEAR DISAGREE ON APPROACH, SHOWING THE NOSE GEAR NOT DOWN AND LOCKED. MISSED APPROACH, FOLLOWED THE QRH AND DECLARED AN EMERGENCY. THE FLIGHT LANDED WITHOUT INCIDENT AND TAXIED TO THE GATE UNDER ITS OWN POWER. R & R THE NLG DOWNLOCK PROXIMITY SENSOR, SWUNG GEAR SEVERAL TIMES IAW AMM.