As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE GEAR DISAGREE WARNING DURING TAKEOFF. FOLLOWED QRH AND PERFORMED EMERGENCY EXTENSION AND PLACED HANDLE IN DOWN POSITION MESSAGE CLEARED. REMOVED AND REPLACED NLG SELECTOR VALVE. OPS CHECKED GOOD. CYCLED GEAR MULTIPLE TIMES. OPS CHECKED GOOD.