As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT THEY RECEIVED A LANDING GEAR LEVER DISAGREE MESSAGE UPON GEAR RETRACTION. THE CREW FOLLOWED THE QUICK REFERENCE HANDBOOK AND CYCLED THE LANDING GEAR, AND THE RIGHT MAIN LANDING GEAR SHOWED IN TRANSIT UPON A SECOND GEAR RETRACTION. THE CREW DECIDED TO RETURN TO KMKE AND DECLARED AN EMERGENCY. THEY LANDED WITHOUT INCIDENT WITH THE LANDING GEAR SHOWING DOWN AND LOCKED. MAINTENANCE REPLACED THE RIGHT MAIN LANDING GEAR UPLOCK BOX. OPERATIONAL CHECKS WERE GOOD WITH NO FURTHER DEFECTS NOTED.