As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUSELAGE DOOR WARNING ILLUMINATED AFTER TAKEOFF AT 2000FT, RAN THE CHECKLIST & RETURNED TO FIELD. LANDING UNEVENTFUL. REMOVED FROM SERVICE. INSPECTED THE ACFT & FOUND AFT CARGO DOOR HANDLE EXTENDED. RESET DOOR HANDLE TO LOCKED. INSPECTED THE LATCH & FOUND TO BE SERVICEABLE, NO WEAR NOTED. PERFORMED AMM 05-0019 05-50-00, CARGO DOOR PASSED ALL PROCEDURE ITEMS. OPERATIONAL TEST OF THE AFT CARGO DOOR GOOD. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.