Where is the hydraulic heat exchanger located?

• A. Aft equipment bay
• B. Forward equipment bay
• C. Engine nacelle
• D. Cockpit

Answer: (A)

Hydraulic heat exchangers work by using outside air to cool the hydraulic fluid as it circulates through the system. On the CRJ-550, this cooling unit is placed in the aft equipment bay so it’s right next to the hydraulic pumps, reservoirs, and lines, making maintenance easier and ensuring a clean, efficient airflow path from the tail area. This location also keeps heat away from the cockpit and avionics while using ram air from the aft region to remove heat effectively. Putting the exchanger in the forward equipment bay or in the engine nacelle would complicate ducting, introduce more heat sources near critical components, and disrupt other systems. The cockpit is not a viable housing for such equipment due to space and safety considerations.