As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED A GEAR DISAGREE WARNING MESSAGE ON APPROACH. CREW ABORTED THE APPROACH, FOLLOWED THE QRH AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND FOUND A LOOSE CONNECTOR TO THE MAIN LANDING GEAR SELECTOR VALVE. MAINTENANCE REINSTALLED THE CONNECTOR. OPERATIONAL CHECKS WERE PERFORMED. AIRCRAFT WAS RELEASED FOR SERVICE.