As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT THE -CARGO DOOR- CAUTION MESSAGE ILLUMINATED. PRESSURIZATION WAS STABLE. THE CREW FOLLOWED THE QRH AND ELECTED TO RETURN TO XNA. MAINTENANCE FOUND THE CARGO DOOR HANDLE POPPED OUT. THE HANDLE WAS INSPECTED AND OPERATIONALLY CHECKED. NO DEFECTS WERE FOUND. THE DOOR HANDLE WAS PROPERLY SECURED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.