Air Systems

Question 1

3 Sources of Bleed Air

Answer 1

Ground Pneumatic

Engine

APU

Question 2

Bleed Air is used for 10 systems

Answer 2

Air Conditioning Air Driven Hydraulic Pumps

Pressurization Hydraulic Reservoir

Wing & engine anti ice Potable water tank

APU and engine start TAT probe aspiration

Aft cargo heat Equipment cooling

Question 3

Apu Bleed Air is available below

Answer 3

22000’

Question 4

Bleed Air Isolation Valves in Auto are controlled

Answer 4

by the Air Supply Cabin Controller

Question 5

Bleed Air Valves are

Answer 5

All of the valves are electrically controlled and the engine bleed valves are pneumatically operated

Question 6

Engine Bleed Valves

Answer 6

The engine bleed valve switches are different from APU bleed valve switch and they are activated by ON / OFF switches.

The amber OFF indicates valve position.

Question 7

After Engine start the PRSOV will

Answer 7

then open causing the trim air and the packs to open and the center isolation valve to close.

Question 8

when External air is supplying the pneumatic system.

Answer 8

The left, center and right ISLN valves open

Question 9

If a bleed leak occurs

Answer 9

the system automatically detects and isolates the leak.