How many engine-driven hydraulic pumps are on the CRJ?

How many engine-driven hydraulic pumps are on the CRJ?

• A. One
• B. Two
• C. Three
• D. Four

Answer: (B)

Engine-driven hydraulic pumps are powered by the engines themselves, with each engine driving its own pump. Since the CRJ has two engines, there is a pump on each engine’s accessory gearbox, giving two engine-driven hydraulic pumps in total. This setup provides redundancy for the primary flight-control hydraulics. Note there is an electric standby pump as an alternative power source, but it is not engine-driven.

Engine-driven hydraulic pumps are powered by the engines themselves, with each engine driving its own pump. Since the CRJ has two engines, there is a pump on each engine’s accessory gearbox, giving two engine-driven hydraulic pumps in total. This setup provides redundancy for the primary flight-control hydraulics. Note there is an electric standby pump as an alternative power source, but it is not engine-driven.