As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 2717 THE CREW REPORTED THAT AFTER TAKEOFF THE GEAR RETRACTION SHOWED NO IN TRANSIT LIGHTS AND IMMEDIATELY SHOWED "UP" MAIN LANDING LIGHTS SHOWED RMU SHOWED DOWN AND LOCKED NO IN TRANSIT UPON GEAR EXTENSION. THE CREW ELECTED TO RETURN TO DFW. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE LANDING GEAR ELECTRONIC UNIT IAW EMB 32-32-0. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.