What was found
PASSING THROUGH 2000 FEET ON DEPARTURE OUT OF SEA GOT A FUSELAGE DOOR WARNING. RETURNED TO FIELD. LANDING UNEVENTFUL. REMOVED FROM SERVICE. UPON ARRIVING AT GATE FOUND AFT CARGO DOOR HANDLE TO BE IN UN-STOWED CONDITION. PREFORMED OPS TEST OF AFT CARGO DOOR IAW MCN HS# 52-0028 AND AMM 52-31-00-710-801 OPS CHECK GOOD. DOOR HANDLE RESTOWED AND STAYED LATCHED. INDICATION CHECK GOOD. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.