As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE FLIGHT CREW REPORTED: ON DEPARTUE, THE GEAR DISAGREE WARNING MESSAGE IN ASSOCIATION WITH THE RIGHT GEAR SHOWING RED. QRH PROCEDURE FOLLOWED AND AIRCRAFT RETURNED TO THE DEPARTING AIRPORT, EMERGENCY DECLARED, THE LANDING WAS UNEVENTFUL. MAINTENANCE FOUND LOOSE PROX TARGETON THE RIGHT MLG. TARGET RE-SECURED AND AIRCRAFT RETURNED TO SERVICE AFTER A GEAR SWING.