The engine bleed valves are controlled by _______________.

The engine bleed valves are controlled by _______________.

• A. The associated BMC
• B. The hydraulic system
• C. The environmental control unit
• D. The flight management computer

Answer: (A)

Bleed air valve actuation is handled by the Bleed Management Computer. This computer coordinates the engine bleed valves, cross-bleed, and isolation based on signals from the environmental control system and engine parameters, to supply bleed air to the packs and other pneumatic needs while maintaining safe operation. The hydraulic system doesn’t control these valves, the environmental control unit uses bleed air but does not directly command valve positions, and the flight management computer does not manage bleed air control. So the Bleed Management Computer is the dedicated controller for engine bleed valves.

Bleed air valve actuation is handled by the Bleed Management Computer. This computer coordinates the engine bleed valves, cross-bleed, and isolation based on signals from the environmental control system and engine parameters, to supply bleed air to the packs and other pneumatic needs while maintaining safe operation. The hydraulic system doesn’t control these valves, the environmental control unit uses bleed air but does not directly command valve positions, and the flight management computer does not manage bleed air control. So the Bleed Management Computer is the dedicated controller for engine bleed valves.