As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT WITH LIVE CARGO THE CARGO OVERHEAT CAUTION MESSAGE ILLUMINATED. THE CREW FOLLOWED THE QRH AND RETURNED TO CLT. MAINTENANCE INSPECTED THE AFT CARGO COMPARTMENT AND FOUND BAGGAGE BLOCKING THE CONDITIONED AIR VENT. THE BAGGAGE WAS REPOSITIONED. THE CARGO AIR CONDITIONING SYSTEM OPERATIONALLY CHECKED GOOD IAW CRJ700 AMM 21-55-00-710-801-A02. THE AIRCRAFT WAS THEN RELEASED FOR SERVICE.