Pressurization

Question 1

Entrance to the baggage compartment is limited to:

Answer 1

No more than 5 minutes above 40,000

Restricted above 45,000 with single pack ops

Question 2

If cabin pressurization is lost, the aircraft will enter the emergency descent mode (EDM) if:

Answer 2

Autopilot ON
Red CABIN PRESS LOW on CAS
Above 40,000’

Question 3

In emergency descent mode “EDM” the airplane will level off at 15,000. If this is too low, how can it be changed?

Answer 3

Disengage the autopilot and reset the altitude preselect

Question 4

On the ground, when does the FLIGHT / LANDING switch automatically change to FLIGHT?

Answer 4

At taxi speeds above 8 knots

Question 5

On the ground with the FLIGHT / LANDING switch selected to FLIGHT, how will the cabin pressurize?

Answer 5

Cabin will descend to 500’ below field elevation

Question 6

How do you select between the 2 cabin pressure controller channels?

Answer 6

They automatically swap every flight, or by selecting the AUTO/MANUAL switch to MANUAL, then back to AUTO

Question 7

How many power sources are there to the outflow valve motor?

Answer 7

3 total:
2 AC (ESS AC & R MAIN AC)
1 DC (L ESS DC)

Question 8

When will the “CABIN PRESS LOW” CAS message illuminate?

Answer 8

8000’ - field elevation < 7,500’
10,000’ - field elevation 7,500-9,500’
14,500’ - field elevation > 9,500
MANUAL mode - 10,000’

Question 9

What is the power source of the AUTO/SEMI pressure selection switch?

Answer 9

Channel 1 - ESS AC bus

Channel 2 - RIGHT MAIN AC bus

Question 10

When does the dual channel pressurization controller switch channels?

Answer 10

1. Selecting then deselecting MANUAL

2. Cycling main door open and closed after landing

Question 11

Is there a way to determine which channel of the pressurization controller is active?

Answer 11

By viewing the ECS/PRESS synoptic page - lower right corner, or SUMMARY page

Question 12

Where does the pressurization obtain altitude information?

Answer 12

Captain’s side selected ADM (Air Data Module)

Question 13

Where does the pressurization system obtain its landing field elevation?

Answer 13

FMS or pressurization selector panel

Question 14

When does the FLIGHT / LANDING switch change to LANDING?

Answer 14

When a descent is commenced of greater than 1,000 fpm

Question 15

What happens to the FLIGHT / LANDING mode if the aircraft levels off after descent begins?

Answer 15

Will maintain a normal pressure for that altitude. If 3 minutes has elapsed and the aircraft is still above 25,000 feet, it will switch back to FLIGHT mode

Question 16

What is the maximum cabin altitude in AUTO operation?

Answer 16

8,000 feet

Question 17

How do you control aircraft pressurization in the SEMI mode?

Answer 17

Preset the information in the CABIN PRESSURE SELECTOR PANEL located on the center console

Question 18

How long does it take to open the Pressure Relief Valve after landing the AUTO/SEMI mode of operation

Answer 18

1 minute after the outflow valve has fully opened

Question 19

How do we control aircraft pressurization in the Manual mode?

Answer 19

By manipulating the Manual Hold Rate knob that controls the DC motor to open and close the TROV

Question 20

How do we know how much the aircraft is climbing or descending by using the MANUAL rate knob?

Answer 20

Observing the cabin pressure indicator panel

Question 21

If you are planning a flight from a low altitude airport to a high altitude airport (La Paz), how will the cabin pressurization system function?

Answer 21

In AUTO, cabin will climb to 8,000 feet. When a descent is commenced, the cabin will climb to the Landing Field Elevation

Question 22

What are the cabin differential pressure limits?

Answer 22

10.48 psi max diff
< 0.3 taxi takeoff & landing
Access to baggage limited to 5 minutes above 40,000
Access to baggage prohibited above 45,000 during single pack ops

Question 23

When will the Pressure Relief Valve open?

Answer 23

If the TROV has failed, it will begin to open at 10.28 psid or -0.25 psid
During normal ops, it will open 1 minute after the TROV has fully opened after landing

Question 24

How many power sources are there for the TROV?

Answer 24

3 total: 2 AC, 1 DC