Air Conditioning and Pressurisation

Question 1

With engines running in flight and engine bleeds on, one pack in AUTO, isolation valve in AUTO and other pack switched OFF, what will be flow rate of the operating pack?

Answer 1

High flow unless the flaps are not up

Question 2

Where is the conditioned air for the flight deck supplied from?

Answer 2

The left pack upstream of the mix manifold

Question 3

If the Cabin Pressure Controller Automatic Mode were to fail, what indication would be presented?

Answer 3

If the Automatic mode has failed and Alternate is available, amber AUTO FAIL, Geen ALTN would be illuminated and the controller would switch to Alternate mode.

Question 4

What is the function of the recirculation fans?

Answer 4

It reduces the load on the air conditioning system by recirculating air from around the forward cargo bay and back into the mix manifold.

Question 5

Where is exhaust air from the equipment cooling system directed under normal conditions?

Answer 5

The air is diffused to the lining for the forward cargo bay for inflight heating or overboard if differential pressure is low

Question 6

What would illumination of the OFF SCHED DESCENT caption indicate?

Answer 6

The aircraft has started to descend before reaching the selected cruise altitude

Will activate if not within 0.25PSI of cruise altitude

Question 7

What sensors are on the left side for the WING-BODY OVERHEAT indication?

Answer 7

Left Engine Strut
Left Inboard Wing LE
Left AC Bay
Keel Beam
APU Duct

Same on right side without Keel and APU