As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FINAL APPROACH, UPON SELECTING GEAR DOWN, A GEAR DISAGREE MASTER WARNING WAS RECEIVED. THE QRH WAS COMPLIED WITH AND AN EMERGENCY WAS DECLARED. THE AIRCRAFT LANDED SAFELY. MAINTENANCE REMOVED AND REPLACED THE NOSE LANDING GEAR (NLG) UPLOCK ASSY. OPERATIONAL CHECKS GOOD. AC OK FOR SERVICE. (K)