As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKE OFF, RECEIVED GEAR DISAGREE WARNING WITH NOSE GEAR NOT UP AND LOCKED. PERFORMED QRH PROCEDURE AND NOSE GEAR CAME DOWN & LOCKED WITH 3 GREEN. LANDED WITHOUT INCIDENT. (FLT#4249) FO: 07/12/2019 CLOSED REMOVED AND REPLACED MANUAL BYPASS NOSE DOOR VALVE IAW AMM. OPS CHECK AND LEAK CHECK GOOD.