Air Conditioning

Question 1

What does the air conditioning system provide?

Answer 1

Cooled and humidified air as well as de-misting

Question 2

How many air conditioning packs (air cycle machines) are there?

Answer 2

One

Question 3

What does FLT COMPT DUCT HOT light mean?

Answer 3

Flight compartment duct temp is greater than 88 C, pack trim valves are driven to maximum cooling, light goes out when temp drops below 82 C

Question 4

What does CABIN DUCT HOT light mean?

Answer 4

Cabin supply duct temp is greater than 88 C, pack trim valves are driven to maximum cooling, light goes out when the temp drops below 82 C

Question 5

What does AIR COND PACK HOT light mean?

Answer 5

Overheat condition exists in the air cycle machine, bleed air automatically shuts off, light goes out if condition clears and resumes normal operations

Question 6

What will loss of engine bleed air to the air conditioning system as a result of ACM over temperature cause?

Answer 6

Gradual pressurization loss

Question 7

What does the heat exchanger in the air conditioning system do?

Answer 7

Removes heat

Question 8

What is the operational difference between auto and manual?

Answer 8

No additional crew workload in the AUTO mode

Question 9

What action should be taken in the event of a CABIN DUCT HOT caution light illuminating?

Answer 9

Use the CABIN DUCT HOT checklist in the QRH