As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF AND AFTER GEAR SELECTED UP RECEIVED GEAR DISAGREE WARNING MESSAGE. GEAR INDICATIONS SHOWED NOSE GEAR DOWN AND MAINS UP. NOSE DOOR OPEN WARNING MESSAGE ALSO DISPLAYED. FOLLOWED QRH PROCEEDURE WITH EMERGENCY GEAR EXTENSIONHANDLE PULLED. LANDED UNEVENTFUL