What type of engine air bleed valves are installed on the CRJ-700?

• A. Electrically controlled PRSOVs
• B. ACSC controlled PRSOVs
• C. Mechanically controlled PRSOVs
• D. Hydraulically actuated bleed valves

Answer: (B)

In the CRJ-700, the engine bleed air valves (PRSOVs) are commanded by the Aircraft’s Air Conditioning System Controller (ACSC). This setup allows the bleed valves to be opened or closed automatically to regulate bleed air flow and pressure for the packs and other systems, based on pack demand, altitude, and engine state. The ACSC provides coordinated control, so the valves respond to overall system needs rather than being driven directly by a pilot lever, a purely electrical signal, or a hydraulic actuation alone. That’s why the description “ACSC controlled PRSOVs” is the best fit.