Pneumatics Flashcards
1
Q
What is the purpose of the pneumatic system?
A
To provide hot, high temperatue are from the engines to various systems. Engine start. Cowl and wing anti-ice. Air conditioning. Pressurisation.
2
Q
How is bleed air normally supplied?
A
From the 6th and 10th stage of the high pressure compressure of the engines. Normally from the 6th stage unless the demands of the system are higher.
3
Q
What is the purpose of the isolation valve?
A
To connect/separate the left and right sides of the pneumatic system.
4
Q
Aside from the engines, how else can air be supplied to the system?
A
From the APU through a load control valve, or by huffer cart.
5
Q
How is the bleed air supply regulated or shutoff?
A
PRSOV. It modulates to keep the system pressure at 45 PSI.
6
Q
When is the PRSOV closed?
A
At engine shutdown.
The controller signals are lost.
The engien fire pushlight has been pressed.
7
Q
Can the APU supply anti-ice air?
A
No.
