Which of the following is NOT part of the preflight inspection process?

The preflight inspection process involves several important checks to ensure an aircraft is safe and ready for flight. Part of this process includes a visual inspection of antennas to ensure they are secure and functioning properly. Inspecting avionics and electronics components is critical to ensure all systems are operational and there are no visible signs of damage or malfunction. Confirming the external power supply to avionics units is also necessary, especially in aircraft that rely on ground power before takeoff.

Checking aircraft fuel levels, while essential for flight preparation, is typically categorized under fueling operations rather than preflight inspection protocols. Preflight inspections focus more on the physical and functional condition of the aircraft’s systems and components rather than the fuel itself. Therefore, it does not fit within the traditional scope of preflight inspections.