Which of the following pumps is NOT found in the Pilatus PC-12 NG fuel system?

The Pilatus PC-12 NG fuel system incorporates various pumps that contribute to its efficient operation and performance, including an electrical pump, a low-pressure pump, and a high-pressure pump. Each of these components plays a specific role in ensuring that fuel is delivered correctly from the tank to the engines.

The electrical pump is primarily used for boost and transfer of fuel, while the low-pressure pump feeds fuel to the engine's high-pressure pump, which ultimately injects fuel into the engine for combustion. These components are critical for maintaining pressure and ensuring that adequate fuel supply is available under different operational conditions.

In contrast, a submersible pump, which is typically used in applications such as older fuel systems or specific types of aircraft where fuel is drawn from within the tank, is not part of the Pilatus PC-12 NG setup. The design of the Pilatus system utilizes the other types of pumps mentioned to facilitate fuel pressure and flow, rendering a submersible pump unnecessary. This understanding of the fuel system is essential for the safe and efficient operation of the aircraft.