As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKE OFF, THE CREW TRIED TO RETRACT THE LANDING GEAR AND RECEIVED A GEAR DISAGREE WARNING MESSAGE. THE MAIN GEAR DISPLAYED UP AND LOCKED, BUT THE NOSE GEAR WAS STILL SHOWING DOWN AND GREEN. FOLLOWED THE QRH AND SELECTED THE GEAR MANUAL RELEASE AND ALL GEAR SHOWED DOWN AND LOCKED. DIVERTED AND DECLARED AN EMERGENCY. MAINTENANCE VISUALLY INSPECTED THE GEAR AND NO DEFECTS WERE FOUND. THE LANDING GEAR RETRACTION SYSTEM WAS THEN PLACED ON MEL.