What test can help confirm there is no air leak in the fuel system after maintenance?

What test can help confirm there is no air leak in the fuel system after maintenance?

• A. A pressure test of the fuel system with the system pressurized and watching for pressure drop or using leak-detection methods.
• B. A visual inspection of fuel lines for leaks only.
• C. A test by running the engine to check fuel supply.
• D. A hydrostatic test not related to the fuel system.

Answer: (A)

Testing for air leaks in the fuel system after maintenance is done by pressurizing the system and watching for pressure changes. Seal the system, apply a known pressure, and monitor; if the pressure holds, there’s no leak, if it drops, there’s a leak and you can locate it with leak-detection methods. Visual inspection alone can miss small or pressure-dependent leaks, and running the engine or using a hydrostatic test not related to the fuel system won’t specifically verify the fuel lines’ integrity.

Testing for air leaks in the fuel system after maintenance is done by pressurizing the system and watching for pressure changes. Seal the system, apply a known pressure, and monitor; if the pressure holds, there’s no leak, if it drops, there’s a leak and you can locate it with leak-detection methods. Visual inspection alone can miss small or pressure-dependent leaks, and running the engine or using a hydrostatic test not related to the fuel system won’t specifically verify the fuel lines’ integrity.