As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5389 - RECEIVED GEAR DISAGREE DURING EXTENSION INDICATION NOSE GEAR MALFUNCTION. PRIOR TO QRH COMPLETION, MESSAGE DISAPPEARED. DECLARED EMERGENCY AND LANDED WITHOUT INCIDENT. REPLACED NOSE GEAR PRIORITY VALVE, CLEANED AND LUBRICATED NOSE LANDING GEAR. NO FURTHER DEFECTS.