Air Conditioning

Question 1

What are the 4 zones that air temperature can be controlled?

Answer 1

Flight Deck
FWD
Mid
AFT

Question 2

What bus are the recirculation fans on?

Answer 2

Utility Bus

Question 3

What recirculation fan works with the Left Pack

Answer 3

Forward
(Aft with Right Pack)

Question 4

How much extra fuel does an individual pack burn if running in High Flow?

Answer 4

0.3% of total fuel burn

Question 5

With both engines running, When does a pack go to High flow?

Answer 5

Partner fan fail

Question 6

With both engines running, What is the relationship between L and R packs if one pack fails?

Answer 6

Remaining pack goes to high flow

Question 7

What is the relationship between L and R packs if one pack fails?

Answer 7

Remaining pack goes to high flow

Question 8

What happens to the remaining pack when operating with an engine shut down?

Answer 8

With only 1 engine running the remaining pack is inhibited from going in to High Flow

Question 9

Air conditioning panel INOP lights are caused by what?

Answer 9

Indicator that individual zone control valve has experienced a fault

Question 10

Recirc fan INOP light means what?

Answer 10

Fan not working. Refer to logic for why.

Question 11

How many pack controllers does each pack have?

Answer 11

2 AUTO and STBY

Question 12

The cargo area is heated to what temperature with?

Answer 12

Approximately 45 degrees F

Question 13

Which duct supplies air to the cargo compartments?

Answer 13

Aft/bulk cargo come from body duct
Forward cargo comes from centre duct

Question 14

Which bus supplies power to the Recirc fans?

Answer 14

Utility bus

Question 15

If carrying live animals, what do we do?

Answer 15

Bulk cargo heat selected to VENT to raise temperature to 65 using additional cabin temperature

Question 16

If normal system works correctly when does the heat control valve protection close?

Answer 16

90 degrees

Question 17

When do the cargo control valves work?

Answer 17

Heat control Valve closes when temperature rises to 90 degrees
Shutoff control valve closes when temperature drops below 45 degrees

Question 18

With both engines running, When does a pack go to High flow?

Answer 18

Partner fan fail

Question 19

With both engines running, What is the relationship between L and R packs if one pack fails?

Answer 19

Remaining pack goes to high flow

Question 20

What happens to the remaining pack when operating with an engine shut down?

Answer 20

With only 1 engine running the remaining pack is inhibited from going in to High Flow

Question 21

The R bleed air system supplies duct air to where?

Answer 21

R Pack
R Wing Anti-Ice
R HYD Res

Question 22

The Body duct bleed air system supplies duct air to where?

Answer 22

ADP
Aft Cargo Heat
Bulk Cargo Heat
C HYD Res

Question 23

The L bleed air system supplies duct air to where?

Answer 23

L Wing Anti Ice
L HYD Res

Question 24

What are the possible reasons are there for the Pack INOP light?

Answer 24

Air too hot
Fault in the controller system

Question 25

What does a pack off light illuminated mean?

Answer 25

Pack valve closed