Air Conditioning and Presurization

Question 1

Memory Items:

Answer 1

1. Oxygen mask - Use
2. BLEED switch - Check/Correct
   If possible:
3. TRQ - Reduce

>Fly the airplane<

4. BLEED switch - OFF/RST
5. BLEED switch - AUTO

Question 2

Memory Items:

Answer 2

1. Oxygen masks . . . . Use

Question 3

Memory items:
Emergency Descent Mode CAS message:
1. Item

Answer 3

1. Oxygen masks . . . . Use

Question 4

ECS—Environmental Control System, the 3 sub-system are:

Answer 4

• EBAS—Engine Bleed Air System
• CPCS—Cabin Pressurization Control System
• TCS—Temperature Control System

Question 5

The purpose of the EBAS—Engine Bleed Air System: is to:

(Three items)

Answer 5

• Regulate the bleed air from the engine.
• Ensure a controlled airflow in the cabin.
• Adjust the bleed air temperature for cabin heating.

Question 6

The 2 Bleed Status messages that can be displayed on the Single Engine Indicator (SEI):

Answer 6

• P2.5 HI (P2.5 port exceeds 7 pounds per minute).
• P3 (P3 port is open).

Question 7

The Cabin Air Controller—CPCS, controls the modulation of…

Answer 7

…the OutFlow Valve (OFV)—to reach the computed cabin altitude.

Question 8

For proper operation of the Cabin Pressurisation Control System, the bleed switch must be in which position…

Answer 8

…must be in AUTO position.

Question 9

Cabin Air Controller will manage the cabin altitude to reach the:

Answer 9

LFE—Landing Field Elevation, by 1,500 ft AGL to landing.

Question 10

The 2 independent air circuits for the Temperature Control System (TCS) are…

Answer 10

Cabin Heating System—CHS

Vapour Cycle System—VCS

Question 11

Automatic load shedding feature when MAIN GEN is ON:

Answer 11

• Turns off the Ground Fan.
• Turns off the Condenser Fan.
• Opens the compressor clutch.

Question 12

Automatic load shedding feature during engine start:

Answer 12

Turns off the Vapor Cycle System.

Question 13

Maximum Altitude

Answer 13

31,000 ft (9,449 m)

Question 14

Maximum Differential Pressure

Answer 14

6.2 psi

Question 15

Maximum Cabin Altitude

Answer 15

9,350 feet

Question 16

What does the NORM/DUMP switch do?

Answer 16

• NORM, the cabin is automatically depressurized as soon as the airplane is on ground through landing gear switch.
• DUMP, the “DUMP” switch allows the pilot to open the Out-FlowValve in order to de-pressurize the cabin.

Question 17

The OFV is fitted with a cabin altitude limitation device which…

Answer 17

Overrides the “DUMP” function and forces the closure of the OFV if the cabin altitude reaches 14,500 ft.

Question 18

Answer 18

Indicates that the cabin altitude is over 10,000 ft.

Question 19

Answer 19

Indicates that the cabin differential pressure is over 6.4 psi ± 0.2 psi.

Question 20

Answer 20

Indicates that, due to an electrical failure or a loss of communication with the avionics, the Cabin Air Controller is unable to compute optimal cabin altitude. In this condition, the CPCS will control the cabin altitude to a default value of 9,800 ft.

Question 21

Answer 21

Indicates that the cabin pressurization is degraded without total loss of cabin pressurization, or that the heating system is degraded.

Question 22

Emergency air control, “EMERGENCY RAM AIR” selector, enables outside air to enter the cabin through a valve.

TRUE or FALSE?

Answer 22

TRUE

Reduce the cabin differential pressure to be able to pull out the EMERGENCY RAM AIR control knob. If necessary, depressurize the cabin.