What is a primary function of the engine-driven hydraulic pump?

The primary function of the engine-driven hydraulic pump is to maintain hydraulic pressure for flight controls. In an aircraft hydraulic system, hydraulic pumps are responsible for generating and maintaining the necessary pressure to operate various control systems, such as ailerons, elevators, and rudders. These systems rely on hydraulic pressure to function effectively and provide the pilot with precise control over the aircraft's movements.

The engine-driven hydraulic pump converts the mechanical energy from the engine into hydraulic energy, allowing the hydraulic fluid to move through the system under pressure. This is crucial for ensuring that flight control surfaces respond quickly and accurately to pilot inputs, ultimately ensuring safe and efficient aircraft operation.

Other functions such as supplying electrical power or activating standby systems are not the primary roles of the engine-driven hydraulic pump. Similarly, while the cooling of hydraulic fluids is an important aspect of hydraulic system maintenance, it is not the main purpose of the pump itself. Instead, it focuses on providing the necessary hydraulic pressure to drive various components in the flight control system.