As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3363 DURING CLIMBOUT THE CREW REPORTED, HAD A LANDING GEAR LEVER DISAGREE MESSAGE. THE NOSE GEAR INDICATION WAS RED. THE CREW DECLARED AN EMERGENCY AND ELECTED TO RETURN TO DFW. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE NOSE LANDING GEAR UPLOCK BOX IAW EMB MM 32-33-07. THE OPERATIONAL CHECK AND LEAK CHECKS WERE GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.