As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ROTATION, MASTER WARNING FOR CARGO DOOR ILLUMINATED. RETURNED TO FIELD. LANDING UNEVENTFUL. UPON ARRIVAL AT GATE FOUND AFT CARGO DOOR HANDLE NOT COMPLETLY IN DETENT PERFORMED. OPS TEST OF AFT CARGO DOOR IAW AMM TASK 52-31-00-710-801. NO DEFECTS NOTED GROUND PRESSURIZED ACFT IAW AMM TASK 21-00-00-863-801 AND 21-00-00-863-802 NO FURTHER DEFECTS NOTED.