As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW RECEIVED A FUSELAGE MASTER WARNING LIGHT. CREW FOLLOWED QRH, DID NOT DECLARE AN EMERGENCY AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND FOUND AFT CARGO DOOR HANDLE POPPED OUT AND NOT SECURE. MAINTENANCE PERFORMED OPS CHECKED OF AFT CARGO DOOR IAW AMM, RESECURED HANDLE AND OPS CHECKED GOOD. ACFT IS GOOD FOR SERVICE.