As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED AN AMBER CABIN ALTITUDE MESSAGE IN FLIGHT AFTER DEPARTURE FROM SAV. AIRCRAFT RETURNED TO SAV AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND THE AFT CARGO DOOR NOT CLOSED PROPERLY. MAINTENANCE INSPECTED THE DOOR AND TRACKS AND PERFORMED CHECKS USING THE AIRCRAFT MAINTENANCE MANUAL. NO DEFECTS WERE NOTED. AIRCRAFT WAS RELEASED FOR SERVICE.