As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED AN AFT CARGO DOOR AMBER CAUTION ON TAKEOFF. CREW ELECTED TO RETURN TO OAJ. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND FOUND THE AFT CARGO DOOR HANDLE WAS POPPED. MAINTENANCE INSPECTED THE AFT BAGGAGE BAY DOOR, PERFORMED CHECKS AND SECURED THE DOOR CLOSED. NO OTHER DEFECTS WERE NOTED. AIRCRAFT WAS RELEASED FOR SERVICE.