Simulation-Based Training Aid for pilots and maintenance technicians on Engine Fuel system of the Hercules C-130 aircraft. This application supports data from Allison engines, models T56-A-7B and T56-A-15. From the reservoir to the injectors, some 10 interactive schematics explain clearly the flow and control of the fuel. Because of its important role, we have chosen to fully simulate the Fuel Control Unit operations in great detail. The application also includes engine startup and shutdown procedures in various conditions. Some 10 system faults and over 100 photographs and drawings support the teaching and comprehension of this system. Aircraft models supported: E, H, H73, H84 and H30.