What was found
ABORTED TAKEOFF AT 80 KNOTS DUE TO FUSELAGE DOOR MASTER WARNINNG. APPLIED LIGHT TO MEDIUM BRAKING AND USED PROPELLERS IN DISC TO STOP. UNEVENTFUL. REMOVED FROM SERVICE. GROUND CREW REPORTED WHEN ACFT RETURNED TO GATE, THE CARGO DOOR HANDLE WAS OUT, PUSHED HANDLE IN WITH NO PROBLEM. COMPLIED WITH 05-0029 AND PERFORMED AN OPS CHECK IAW AMM 52-31-00-710-801. NO RECENT HISTORY. ACFT OK FOR CONTINUED SERVICE.