Air Management

Question 1

List the items that use bleed air.

Answer 1

Environmental control system (ECS), engine start, engine, wing and horizontal stab anti-ice, cargo heat (optional), main cabin door pressurization seal.

Question 2

When is the cabin temp control transferred to the VIP seat panel?

Answer 2

When detention C is selected with the PAX CABIN temp control knob on the overhead panel.

Question 3

In the event of a bleed leak detection, what light will illuminate in addition to an associated CAS message?

Answer 3

The amber light in either the PAC, BLEED 1, BLEED 2 or APU BLEED button.

Question 4

When is the Outflow Valve (OFV) indication on Environmental Control System (ECS) synoptic page displayed?

Answer 4

Only on the ground.

Question 5

What are the potential sources of bleed air that the Pneumatic System Controller (PSC) can automatically select from?

Answer 5

Engines, APU and external air.

Question 6

Is it possible to have bleed from the APU and engines simultaneously?

Answer 6

No.

Question 7

During normal operations on the ground and for taxi, what is the primary source of bleed air?

Answer 7

APU.

Question 8

What is the primary source of bleed air in flight?

Answer 8

Engines.

Question 9

When will the bleed air source be automatically transitioned to the engines?

Answer 9

Takeoff roll with TLA greater than 50 degrees.

Question 10

The XBSOV is automatically commanded to close for what conditions?

Answer 10

Bleed leak, over pressure, engine fire, or if a failure condition is identified.

Question 11

Can the external ground connection be used to supply pressurized air for engine start?

Answer 11

Yes.

Question 12

If an external pneumatic power source is being used and is not adjustable, what range should the pressure supply be in?

Answer 12

Between 32 and 60 psi.

Question 13

When is fast cooling enabled on hot days and fast warming enabled on cold days?

Answer 13

When the difference between cockpit/cabin temp set point and cockpit/cabin zone temp is equal to or higher than 6c.

Question 14

What happens to the recirculation fan during fast cooling and fast warming?

Answer 14

Automatically sets a higher speed to optimize performance.

Question 15

If the air conditioning pack fails what does the PSC automatically do?

Answer 15

It engages the the pack backup operational mode and controls cabin and cockpit temperature.

Question 16

What is ram air ventilation used for?

Answer 16

Non-pressurized flight or smoke evacuation.

Question 17

When will the PSC command the emergency RAM air door to open?

Answer 17

In case of loss of the air condition PACK and the PACK backup system.

Question 18

How can the emergency RAM air door be manually commanded to open?

Answer 18

The DUMP button on the PRESSURIZATION control panel.

Question 19

How is the cargo heating system operated?

Answer 19

Automatically by the PSC.

Question 20

When is the cabin door pressurization seal inflated?

Answer 20

After takeoff.

Question 21

How can the outflow valve be modulated?

Answer 21

Automatically or manually.

Question 22

What position are the Negative Pressure Relief Valve and Pressure Relief Valve (NPRV/PRV) normally in?

Answer 22

Closed

Question 23

What does pushing in the MODE selector button on the PRESSURIZATION panel allow for?

Answer 23

Manual control of the pressurization system through the CABIN ALT knob.

Question 24

What is the cabin altitude rate of change when moving the CABIN ALT knob up or down?

Answer 24

50 fpm steps.

Question 25

What happens when the DUMP button is pressed in the automatic mode of operation?

Answer 25

The cabin altitude is depressurized at a constant rate of 2000 fpm up to 12,000 ft cabin alt, and fresh air enters the cabin via emergency ram air supply.

Question 26

What happens when the DUMP button is pressed in the manual mode of operation?

Answer 26

The valve will be commanded to full open (it will not limit the cabin rate of change) until either the command is removed or the altitude-limit function disables it when the cabin altitude reaches 14800 ft ±200 ft. Emergency ram air supply is opened.

Question 27

What is the maximum differential pressure for a 6,000 ft cabin altitude? For a 5,800 ft cabin altitude?

Answer 27

9.64 psid and 9.73 psid.

Question 28

What is the maximum differential overpressure?

Answer 28

10.4 psid.

Question 29

What is the maximum differential negative pressure?

Answer 29

-0.5 psid.

Question 30

What is the maximum differential pressure for takeoff and landing?

Answer 30

0.2 psid.