What is the first component in the fuel flow system from the left/right tanks?

The first component in the fuel flow system from the left or right tanks is the sump, also commonly referred to as a sediment bowl or fuel strainer. This component is designed to collect and separate any water, contaminants, or sediments that may be present in the fuel. Since water is denser than fuel, it will settle at the bottom of the sump, allowing for easy removal and ensuring that clean fuel is directed toward the engine.

The placement of the sump at the very beginning of the fuel flow process is critical for engine performance and safety, as it prevents contaminated fuel from entering the fuel system. The other components in the fuel flow, such as the fuel selector valve, auxiliary fuel pump, and strainer, come into play after the sump, making it essential that the sump operates effectively to maintain fuel quality from the outset.