The DC-10 fuel system is described with details given for the various subsystems. Reasoning is given for some design features of the several subsystems. System performance capabilities are discussed, including refuel rates and times for various nozzle configurations and fuel supply pressures, defuel capability using pressure and suction methods, pump sizes, and jettison rates. System refinements made since introduction of the DC-10 into commercial service are described. Service experience with the fuel system is discussed.________________