Air Systems

Question 1

How is the duct press indicator powered?

Answer 1

AC

Question 2

Can you operate more than pack per engine

Answer 2

Yes but do not do it

Question 3

What causes pack light to illuminate?

Answer 3

Pack ovht/trip off
Primary and secondary pack control fail

Question 4

How does the pack work?

Answer 4

Air from bleed goes through a heat exchanger which uses RAM AIR. Than it passes through the air cycle machine (turbine) than It is combined with hot air that bypassed the pack than moisture is removed by a high press water seperator

Question 5

What is the selector range for temp selectors?

Answer 5

18-30 Degrees

Question 6

What happens of zone temp light illuminates?

Answer 6

Trim air modulating valve closes

Question 7

Where is ovht detection provided in airco system?

Answer 7

Downstream of packs and mix manifold

Question 8

What does cooling off light mean

Answer 8

Loss of airflow of an equipment cooling fan

Question 9

What happend when pack in high and recirc fans off?

Answer 9

Smoke control relay will shut off equipment cooling supply fan for 5 mins

Equip cooling off light inhibited during this time

Equipment cooling exhaust fan shutoff for remainder of flt

Question 10

What will happen to autofail light with outflow valve control fault

Answer 10

It illuminates

Question 11

How is the DC motor powered in MAN mode

Answer 11

DC STANDBY