Pneumatics

Question 1

The external air connection enters through the right side of the bleed manifold. How is it introduced into the left manifold?

Answer 1

By opening the isolation valve

Question 2

What is the corrective action for a red “L PYLON HOT” CAS message?

Answer 2

Turn off the left engine bleed air switch and the left air conditioning pack switch

Question 3

What is the corrective action for a red “AFT EQUIP HOT” CAS message?

Answer 3

Determine which side has a possible bleed air leak (high TGT and fuel flow), and turn off the affected engine bleed air switch and air conditioning pack switch

Question 4

What are the minimum pressure and temperature set points of the bleed air system?

Answer 4

Normal - 15psi
Low Power Settings - 26psi
Single Pack Ops - 35psi
Wing A/I ON - 570F

Question 5

Other than selecting the isolation valve switch to OPEN, what other switch selections will automatically open the isolation valve?

Answer 5

START MASTER / CRANK MASTER
APU BLEED AIR (on ground)

Question 6

What is the function of the RAM AIR switch?

Answer 6

Turns OFF both air conditioning packs and allows ambient air into the cabin when the pressure vessel completely depressurizes

Question 7

Will the autothrottles be inhibited if the isolation valve is OPEN?

Answer 7

No, autothrottles operate normally regardless of the isolation valve position

Question 8

What temperature ranges are available in Auto mode? Manual Mode?

Answer 8

Auto - 60-90C
Manual - 35-230C