As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5021 - ON APPROACH INTO JFK SELECTED GEAR DOWN AND RECEIVED GEAR DISAGREE WARNING MESSAGE, FOLLOWED BY AMBER NOSE GEAR INDICATION AND NOSE DOOR WARNING. ALL CLEARED WITHIN APPROX 30 SECONDS. AIRCRAFT LANDED SAFELY IN JFK. REMOVED AND REPLACED MLG PRIORITY VALVE.