Praetor Air Management

Question 1

List the items that use bleed air

Answer 1

Environmental Control System (ECS),
Engine Start,
Engine Wing and Horizontal Stabilizers Anti-icing system,
Cargo heating system (optional),
Main Cabin Door Pressurization Seal

Question 2

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

Answer 2

Whe the detent C is selected to the PAX CABIN TEMPERATURE CONTROL KNOB

Question 3

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

Answer 3

The PACK, BLEED 1, BLEED 2, or APU BLEED amber light

Question 4

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

Answer 4

It is only available 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, the APU and external connections

Question 6

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

Answer 6

No

Question 7

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

Answer 7

The APU

Question 8

What is the primary source of bleed air in flight?

Answer 8

The engines

Question 9

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

Answer 9

When the airplane starts running for takeoff (engine’s TLS’s higher than 50 degrees)

Question 10

The XBSOV (cross bleed shut off valve) is automatically commanded to close for what conditions?

Answer 10

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

Question 11

Can an external ground connection be used to supply pressurized air for an 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 psi and 60 psi

Question 13

When is fast cooling enabled on hot days?

Answer 13

When the difference between the cockpit/cabin temperature set point and the cabin/cockpit zone temperature is equal to or higher than 6 degrees Celsius

Question 14

When is fast warming enabled on cold days?

Answer 14

When the difference between the cockpit/cabin temperature set point and the cabin/cockpit zone temperature is equal to or higher than 6 degrees Celsius.

Question 15

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

Answer 15

It automatically sets a higher speed to optimize system performance

Question 16

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

Answer 16

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

Question 17

What is ram air ventilation used for?

Answer 17

Non-pressurized flight or for smoke evacuation

Question 18

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

Answer 18

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

Question 19

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

Answer 19

Through the DUMP button on the PRESSURIZATION control panel

Question 20

How is the Cargo Heating System operated?

Answer 20

Automatically by the PSC

Question 21

When is the main cabin door pressurized seal inflated?

Answer 21

After takeoff

Question 22

How can the outflow valve be modulated?

Answer 22

Either automatically or manually

Question 23

What position are the Negative and Positive Pressure Relief Valves (NPRV and PRV) normally in?

Answer 23

Closed

Question 24

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

Answer 24

Manual control of the pressurization system through the CABIN ALT knob

Question 25

What is the cabin altitude rate of change when moving the CABIN ALT knob UP or DN

Answer 25

50 FPM steps

Question 26

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

Answer 26

The cabin is depressurized at a constant rate of change of 2,000ft/min up to 12,000ft and the emergency RAM air door is opened

Question 27

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

Answer 27

The cabin rate of change will increase with the duration of the dump command; until either the command is removed or the altitude limit function disables it when the cabin altitude reaches 14,800ft +/- 200 ft. The emergency RAM air door is also opened

Question 28

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

Answer 28

9.64psid; 9.73 psid

Question 29

What is the maximum differential overpressure?

Answer 29

10.4psid

Question 30

What is the maximum differential negative pressure

Answer 30

-0.5psid

Question 31

What is the maximum differential pressure for takeoff and landing?

Answer 31

0.02psid