Pneumatics mm

Question 1

Where is high pressure engine bleed air tapped from?

Answer 1

14th stage of compressor

Question 2

What does the bleed air pre-cooler do?

Answer 2

It’s function is to control bleed air temp

Question 3

Engine #1 may be started with bleed air from the Engine #2 if?

Answer 3

The crossbleed valve is open or in Auto

Question 4

Do The engine bleed air valves fail open or closed?

Answer 4

Closed

Question 5

When does the crossbleed valve open when the switch is in AUTO?

Answer 5

During Engine starts when the air source is on the opposite side of the valve.

Question 6

When does the engine high stage valve automatically open?

Answer 6

Low engine thrust operation, Anti Ice operations, and cross bleed engine starts

Question 7

What does a Red BLD 1 OVTEMP Warning message mean?

Answer 7

Bleed air temp downstream of heat exchanger is too high

Question 8

What position does the cross bleed valve need to be in for Engine #2 to use the APU bleed air for starting?

Answer 8

Open or Auto

Question 9

When would the APU bleed valve automatically close?

Answer 9

If the engine one bleed is open or if engine 2 bleed is open with the cross bleed valve open.

Question 10

When does the engine high stage valve open?

Answer 10

When the 14th stage air is below 46 psi