As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA- ON FLIGHT NUMBER 2338, RETURNED TO FIELD DUE TO FUSELAGE DOOR WARNING LIGHT CAME ON ON ROTATION. FOUND AFT CARGO DOOR HANDLE NOT STOWED. OPENED/CLOSED CARGO DOOR SEVERAL TIMES AND INSPECTED HANDLE LATCH. NO DEFECTS NOTED. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.