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 RED MSG (UP POSITION SELECTED), PROX SYS FAULT 1. AIRCRAFT RETURNED TO CLT AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AIRCRAFT AND ADJUSTED THE PROX 3 SENSOR. OPERATIONAL CHECKS WERE ACCOMPLISHED PER THE MAINTENANCE MANUAL WITH NO DEFECTS NOTED. NO OTHER DEFECTS WERE NOTED AND AIRCRAFT WAS RELEASED FOR SERVICE.