Air Flashcards
Which stage is low pressure bleed air taken from?
5:th
Which stage is high pressure bleed air taken from?
9:th
Which cargo compartment provides ventilation?
Fwd
How much of the total flow of air entering cockpit and passenger cabin is made up of fresh air respectively recirculation air?
52 % Fresh air
48% Recirculation air
Which side of the pneumatic system is the APU connected to?
Left-hand side
Which side of the pneumatic system is the engine start ground cart connected to?
Right hand side
At what negative pressure opens the negative pressure relief valve?
-0,5 PSI
At what pressure opens the positive pressure relief valve? (Safety valve)
+8,6 PSI
How many outflow valves are there? (Controlling the pressure in the cabin)
1
How many channels are there in total able to control the outflow valve?
- But only one channel at the time controls the OFV.
What is the scheduled differential pressure in the cabin flying above 37,000 feet?
8,4 PSI
What is the scheduled differential pressure flying below 37,000 feet?
7,8 PSI
What is the dump function used for?
Emergency evacuation
Smoke evacuation
Fast cabin depressurisation
Does the dump function work with manual pressurisation?
No. However, packs and recirculation fans will turn off.
What does the warning cabin altitude high mean?
Cabin altitude more than 9700 ft.
Or…
If LFE more than 9400 ft:
Cabin altitude more than LFE + 500 ft.
