PPL » Aircraft Tech Knowledge (A) » Fuel System Components
12.28 Fuel System Components
12.28.2 Describe the function of the following components of a simple fuel system:
(a) fuel selector valve, supply line, strainer and strainer drain;
The following components are part of a simple fuel system and have the following functions: 1. Fuel Selector Valve: This valve allows the pilot to select which fuel tank to draw fuel from. The valve typically has three positions: left tank, right tank, and both tanks. The pilot should select the appropriate position based on the fuel level and balance of the aircraft. 2. Supply Line: The supply line connects the fuel selector valve to the engine-driven fuel pump. This line carries fuel from the selected tank to the engine. 3. Strainer: The strainer is a filter that removes dirt, debris, and other contaminants from the fuel before it enters the engine. The strainer is typically located between the fuel tank and the fuel selector valve. 4. Strainer Drain: The strainer drain is a valve or petcock that allows the pilot to drain any water or debris that has accumulated in the strainer. The pilot should drain the strainer periodically to ensure that the fuel system remains free of contaminants. In summary, the fuel selector valve allows the pilot to select which fuel tank to draw fuel from, the supply line carries fuel from the tank to the engine, the strainer removes contaminants from the fuel, and the strainer drain allows the pilot to drain any water or debris that has accumulated in the strainer.