Air Management System Flashcards
When will the bleed valve system automatically shut down?
When a leak, overpressure, or fail condition is identified
Can APU bleed air be used for the anti-ice system?
No
Is it possible to have the APU and engines supplying bleed air simultaneously?
No
Can a single engine bleed supply air to both ECS packs?
Yes, via the cross bleed valve
How does the negative and positive pressure relief valves work?
Spring loaded check valve that does not require electrical power
When will the negative pressure relief valve open?
When pressure exceeds -0.5 psi between the cabin and surrounding environment
When will the positive pressure relief valve open?
When pressure exceeds 8.6 psi between the cabin and surrounding environment
What is normal differential pressure below 37,000 ft?
7.8 psi
What is normal differential pressure above 37,000 ft?
8.34 psi
Is the dump function available in manual pressurization mode?
No
In manual pressurization mode is there automatic cabin depressurization on the ground?
No
What conditions must be met for the engine bleed valve to automatically open?
- Bleed switch set to auto
- Engine bleed is available
- No fire is detected in the engine
- No bleed duct leak is detected
Recirculation fans provide what percentage of fresh air to recirculated air?
52% fresh air to 48% recirculated air
When will the recirculation fans be commanded off?
- Both packs are commanded off
- Cargo bay fire signal activates
- Dump button is pressed
- Smoke detected in the recirculation bay
- Cabin warmup mode
What provides air to the gasper ventilation system?
Air from the right recirculation fan