What critical function does the hydraulic system serve in the EJet?

The hydraulic system in the EJet plays a crucial role in managing flight controls and landing gear. This system is essential for the operation of various components that are vital for safe and effective flight. Hydraulic systems operate under the principle of Pascal's Law, where a small force applied to a fluid can create a large force, which is necessary for moving heavy components such as ailerons, elevators, and rudders that control the aircraft's flight path.

Additionally, the hydraulic systems facilitate the operation of the landing gear, allowing for safe takeoff, landing, and all associated functions such as gear extension and retraction. Without a reliable hydraulic system, the aircraft’s capabilities related to both maneuverability and ground operations would be severely compromised, impacting overall safety and performance.

The other options do not accurately represent the primary use of the hydraulic system, focusing instead on non-critical operations that could be managed by other systems within the aircraft.