The Aero Commander 500 is a series of light twin-engine aircraft developed and produced by the formerly known Aero Commander, which later became a division of Rockwell International in 1965. The initial production model, the Aero Commander 520, marked the beginning of a line that included numerous variants, each designated with a unique model number. The prototype and early versions were equipped with two Lycoming O-435-A engines, featuring a retractable landing gear and a high-wing monoplane configuration constructed entirely from metal. The later Aero Commander 680T Turbo Commander introduced a stretched fuselage, a larger tail, and pressurization for a more spacious cabin. This variant, the first to incorporate turboprop engines, utilized two Garrett TPE331-43 powerplants.