Pneumatics

Question 1

What pressure air is supplied to the air-conditioning system with the bleeds on and a low power setting?

Answer 1

High pressure

Question 2

What will happen to the NSOV and the HPSOV if there is a loss of electrical power?

Answer 2

HPSOV closes and the NSOV remains open

Question 3

When does the HPSOV open?

Answer 3

When bleed switches are turned on

Question 4

When does the NSOV - Nacelle Shut Off Valve open?

Answer 4

When the bleed switches are turned on and when power is lost to the valve

Question 5

What pressure air is supplied to the air-conditioning system with the bleeds on and a high power setting?

Answer 5

Low pressure

Question 6

What will happen to the HPSOV if there is one engine on low power, and the other is at high power and both bleeds are on?

Answer 6

HPSOV will close

Question 7

During normal operations what is the BLEED configuration for take off?

Answer 7

Rotary knob to min and bleeds switches off

Question 8

What will cause a BLEED HOT caution light to illuminate?

Answer 8

Overheat or Overpressure in the bleed air supply duct

Question 9

What will happen if a BLEED HOT caution light illuminates?

Answer 9

Automatic shutdown of the HPSOV and the NSOV, once the system cools the valves will reopen. System may recycle again