As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED GEAR DISAGREE MESSAGE SHORTLY AFTER TAKEOFF FROM CLT. RIGHT MAIN LANDING GEAR DID NOT RETRACT. CREW RETURNED TO CLT AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED, RE-SECURED LOOSE RIGHT MAIN LANDING GEAR SENSOR TARGET, ADJUSTED UPLOCK SENSOR AND PERFORMED CHECKS USING THE AIRCRAFT MAINTENANCE MANUALS. AIRCRAFT WAS RELEASED FOR SERVICE.