Which hydraulic system powers the landing gear?

The landing gear on the CRJ550 is powered by System 3. This system is specifically designed to handle the extension and retraction of the landing gear, providing the necessary hydraulic pressure and fluid control to operate these critical components reliably.

System 3 is distinct in its function and also plays a role in other hydraulic items on the aircraft, such as the normal brakes and the thrust reversers. Each hydraulic system on the aircraft has designated functions and supports different mechanisms, ensuring that if one system were to fail, others could still operate adequately, providing redundancy and enhancing safety.

In this case, the landing gear's reliance on System 3 is crucial, as both the extension and retraction processes must operate smoothly for safe takeoff and landing operations.