What drives the Low-Pressure Engine Driven pump in the Pilatus PC-12 NG?

The low-pressure engine-driven pump in the Pilatus PC-12 NG is powered by the accessory gearbox. This gearbox is a critical component attached to the engine, designed to drive various accessories at an appropriate speed and efficiency as the engine operates. The engine crankshaft generates the rotational force needed for the gearbox, which in turn transfers this force to the low-pressure pump, enabling it to provide necessary fuel and maintain proper fuel system pressure.

This configuration is advantageous because it allows the pump to operate efficiently in synchronization with the engine's performance, providing reliable fuel delivery throughout the aircraft’s operating range. An electric motor would not be suitable for this application due to the need for consistent, engine-driven operation, and neither a hydraulic system nor direct connection to the engine crankshaft serves the purpose of driving the pump in this specific context.