As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEAR DISAGREE WARNING MESSAGE WHEN BRINGING GEAR UP AFTER TAKE OFF. NOSE GEAR DID NOT COME UP. RAN QRH PROCEDURES FOR GEAR DISAGREE WARNING. QRH PROCEDURES RESULTED IN GEAR DOWN AND LOCKED. IAW QRH LANDING GEAR MANUAL RELEASE HANDLE WAS PULLED. REMOVED AND REPLACED NLG PRIORITY VALVE, AND NLG WOW HARNESS IAW AMM. OPS CHECKED GOOD.