Air Management

Question 1

List the items that use bleed air.

Answer 1

Environmental Control System (ECS); Engine
start; Engine, wing, and horizontal stabilizer
anti-icing system; Cargo heating system (optional);
Main cabin door pressurized seal; Cabin
Pressure Control System (CPCS). (AOM 9-02-40)

Question 2

When is the cabin temperature control transferred

to the VIP seat panel?

Answer 2

When the detent C is selected on the PAX CABIN

TEMPERATURE CONTROL KNOB (AOM 9-02-30)

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 BLEED APU

the amber light (AOM 9-02-30)

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 (AOM 9-02-30)

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 the external connections

AOM 9-02-40

Question 6

Is it possible to have bleed from the APU and the

engines simultaneously?

Answer 6

No (AOM 9-02-40)

Question 7

During normal operation on the ground and for

taxiing, what is the primary source of bleed air?

Answer 7

The APU (AOM 9-02-40)

Question 8

What is the primary source of bleed air in flight?

Answer 8

The engines (AOM 9-02-40)

Question 9

When will the bleed air source be automatically

transitioned to the engines?

Answer 9

When the airplane starts running for takeoff

engine TLAs higher than 50°) (AOM 9-02-40

Question 10

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

Answer 10

In case of bleed leakage, overpressure,
engine fire, or if a failure condition is identified
(AOM 9-02-40)

Question 11

Can an external ground connection be used to

supply pressurized air for an engine start?

Answer 11

Yes (AOM 9-02-40)

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 (AOM 3-01-35)

Question 13

When is fast cooling enabled on hot days?

Answer 13

When the difference between the cabin/cockpit
temperature set point and the cabin/cockpit
zone temperature is equal to or higher than 6°C
(AOM 9-02-50)

Question 14

When is fast warming enabled on cold days?

Answer 14

When the difference between the cabin/cockpit
temperature set point and the cabin/cockpit
zone temperature is equal to or higher than 6°C
(AOM 9-02-50)

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. (AOM 9-02-50)

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
(AOM 9-02-50)

Question 17

What is ram air ventilation used for?

Answer 17

Non-pressurized flight or for smoke evacuation

AOM 9-02-50

Question 18

When will the PSC command the emergency RAM

air door to open?

Answer 18

In case of loss of the air conditioning PACK and

the PACK backup systems (AOM 9-02-50)

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 (AOM 9-02-50)

Question 20

How is the Cargo Heating System operated?

Answer 20

Automatically by the PSC (AOM 9-02-55)

Question 21

When is the main cabin door pressurized seal

inflated?

Answer 21

After takeoff (AOM 9-02-60)

Question 22

How can the outflow valve be modulated?

Answer 22

Either automatically or manually

AOM 9-02-70

Question 23

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

Answer 23

Closed (AOM 9-02-70)

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 (AOM 9-02-30)

Question 25

What is the cabin altitude rate of change when

moving the CABIN ALT knob UP or DN?

Answer 25

50 ft/min steps (AOM 9-02-30)

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 2,000 ft/min up to 12,000 ft
and the emergency RAM air door is opened
(AOM 9-02-70)

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
14,800 ft ± 200 ft. The emergency RAM air door
is also opened (AOM 9-02-70)

Question 28

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

Answer 28

9.64 psid; 9.73 psid (AOM 2-48)

Question 29

What is the maximum differential overpressure?

Answer 29

10.4 psid (AOM 2-48)

Question 30

What is the maximum differential negative pressure?

Answer 30

−0.5 psid (AOM 2-48)

Question 31

What is the maximum differential pressure for

takeoff and landing?

Answer 31

0.2 psid (AOM 2-48)