As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT THE AFT CARGO DOOR CAUTION MESSAGE AND A PROX SYS FAULT STATUS MESSAGE ILLUMINATED. THE CREW ELECTED TO RETURN TO CLT. MAINTENANCE INSPECTED AND OPERATIONALLY CHECKED THE CARGO DOOR IAW CRJ 700 AMM 52-31-00-710-801-A02. THE CARGO DOOR WAS FOUND TO BE IN SERVICEABLE CONDITION. THE DOOR AND HANDLE WERE PROPERLY CLOSED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.