Pneumatic

Question 1

What functions does the pneumatic system serve?

Answer 1

air stair door seal
ice protection
bleed-air warning system
rudder boost
hourmeter

negative pressure for vacuum system

Question 2

Describe the pneumatic system:

Answer 2

P3 airflow (little P3)
Air valves are NO
18 psi
5.3” vacuum

Question 3

Engine start:

Answer 3

Both BL AIR Fail lights extinguish during first engine start.

Bleed air valves need to be in the ENVIR OFF position for engine start

Question 4

Are the instrument air valves normally open?

Answer 4

Yes

Question 5

What is the purpose of EVA tubing?

Answer 5

Bleed air warning system uses EVA tubes to sense leaking pneumatic air