As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED GEAR DISAGREE ON SHORT FINAL AFTER GETTING 3 GREEN INDICATIONS. NOSE GEAR INDICATION CHANGED TO RED. CREW DID A GO-AROUND, DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT, R & R PROXIMITY SENSOR ELECTRONIC UNIT AND PERFORMED CHECKS IAW AMM. ACFT RELEASED FOR SERVICE.