Air Conditioning

Question 1

What controls pack discharge air
temperature and prevents ice
accumulation inside pack by
monitoring compressor inlet and
outlet temperature?

Answer 1

Air Conditioning Controllers (ACCs)

Question 2

How many temperature zones are
there on GVII?

Answer 2

Three: Cockpit, Fwd Cabin, and Aft Cabin

Question 3

What pack outlet temperature would
you expect with packs operating
normally?

Answer 3

35°F

Question 4

What do temperature control rheostats
control?

Answer 4

They control trim air valves that control
mixing of hot air from hot air manifold
with cold air from cold air manifold to
produce comfortable air.

Question 5

How can you select ram air?

Answer 5

Select Ram Air or turn both Pack switches

to Off

Question 6

When does ram air check valve open?

Answer 6

When inside pressure ≤ outside pressure

Question 7

What’s the purpose of ozone filters?

Answer 7

They change bleed air ozone to oxygen to

enhance pax comfort

Question 8

What’s the temperature select range in
automatic mode?

Answer 8

60 to 90°F or 16 to 32°C

Question 9

How is temperature controlled in
manual mode?

Answer 9

Sliders are used to control trim air valve
position from 0 to 100%

Question 10

What type of air comes from overhead
gaspers and baseboards?

Answer 10

Cold air always comes from overhead
gaspers in both cockpit and cabin while
conditioned air comes from baseboards or
foot level outlets