Pressurisation System and Environmental Control System (ECS)

Question 1

What does the Air Management System consist of?

Answer 1

Pneumatic System
Cabin Pressurisation and Control System (CPCS)
Environmental Control System (ECS)

Question 2

What is the Pneumatic system?

Answer 2

The pneumatic system refers to the engine bleed air, control valves and ducting network to supply the CPCS, ECS, wing/stabiliser de-icing and engine anti-icing

Question 3

What is the Cabin Pressurisation and Control System (CPCS)?

Answer 3

The cabin pressurisation control system (CPCS) comprises the components and controls to regulate the cabin altitude at various levels, up to a maximum of 8 000 ft, suitable for human respiration.

Question 4

What is the Environmental Control System (ECS) ?

Answer 4

The environment control system (ECS) comprises the components and controls that regulate the temperature and airflow distribution for crew and passenger comfort and to provide emergency airflow into the cabin for ventilation in the event of smoke and fumes.

Question 5

How would engine bleed air be lost?

Answer 5

Because of engine failure or PRSOV failed closed

Question 6

The Pressure regulation and shutoff valves (PRSOV) regulate bleed air to what
pressure?

Answer 6

28psig(+/-3)

Question 7

What regulates the bleed air pressure from the engine?

Answer 7

The pressure regulating and shutoff valve

Question 8

What effect does the MFD being in reversionary mode have on the pressurisation
system?

Answer 8

The system must be controlled manually by the crew

Question 9

What is the a/c ceiling limits with both bleed supplies and a single bleed supply
available?

Answer 9

41,000ft and 31,000ft

Question 10

How many bleed leak thermal sensors are there?

Answer 10

Nine per side with eight outside the aft pressure bulkhead

Question 11

What is the purpose of Bleed leak thermal sensors?

Answer 11

Bleed air lines detect potentially dangerous hot air leaks or excessive temperatures (over 88-94°C)

Question 12

What is the purpose of the Check Valves?

Answer 12

They prevent back-flow when there is a loss of air bleed from an engine.

Question 13

What are the CPCS Components?

Answer 13

Electronic Control and Monitoring Unit (ECMU)
Out Flow Valve (OFV)
Pressure Relief Valve (PRV)
Static Port
Negative Relief Valve (NRV)

Question 14

What does the PRESSURIZATION MODE selector switch do?

Answer 14

AUTO - Allows automatic operation of the CPCS
MAN - Allows manual operation of the CPCS

Question 15

What does the CABIN ALT selector switch do?

Answer 15

UP - Manually opens the OFV, increasing cabin altitude at approximately 300 ft/min
DN - Manually closes the OFV, decreasing cabin altitude at approximately 300 ft/min

Question 16

When controlling the pressurisation manually how long should the pilot operate the
UP/DOWN switch?

Answer 16

0.5 secs

Question 17

What does the BLEED KNOB do?

Answer 17

OFF VENT - Closes bleed air from both engines and opens the ram air flap valve for emergency ventilation
1 - Allows engine 1 bleed selection
BOTH - Allows engine 1 and 2 bleeds selection
2 - Allows engine 2 bleed selection

Question 18

What does the Dump Button (Guarded) do?

Answer 18

Provides rapid cabin depressurisation by opening the OFV. Commands OFF the recirculation fans

When pressed, the dump function is activated and a white striped bar illuminates on the button. Dump is effective in AUTO and MAN mode

When pressed a second time, system returns to normal

Question 19

What is the cabin altitude depressurisation limits in AUTO and Manual DUMP?

Answer 19

AUTO – 12,000ft, manual DUMP – 14,500ft

Question 19

What is the normal operating differential pressure range between cabin interior and
outside?

Answer 19

-0.1 to +8.4psi

Question 20

What happens when the DUMP button is pressed?

Answer 20

The outflow valve opens and the recirculation fans are turned off

Question 21

What is the colour code for MFD pressurisation data?

Answer 21

GREEN - Normal operating range, cabin alt below 8100 ft
YELLOW - Cautionary operating range, cabin alt 8200 ft to 9800 ft
RED - Warning, cabin alt above 9900 ft
RED X - Invalid, out of range, or failed

Question 22

What are the Cabin Rate colour changes on the MFD?

Answer 22

GREEN - Normal range, cabin descent or climb rate of up to 2500 ft/min
YELLOW - Cautionary operating range, cabin descent/climb of more than 2500 ft/min or invalid information
RED - Warning low flow or cabin pressure leak
RED X - Invalid, out of range, or failed

Question 23

What is Delta P?

Answer 23

Displays the differential pressure between the cabin interior and the outside, in pounds per square inch, regardless of the operating mode

Question 24

What are the colour codes on the MFD for Delta P?

Answer 24

GREEN - Normal operating range, cabin diff is minus 0.1 to plus 8.4 psi
YELLOW - Cautionary operating range, cabin diff is minus 0.4 to minus 0.2 psi OR plus 8.5 to 8.6 psi
RED - Warning, cabin diff below minus 0.4 psi OR above plus 8.6 psi
RED X - Invalid, out of range, or failed

Question 25

What is LFE?

Answer 25

Displays the Landing Field Elevation (LFE) (destination) in ft, regardless of the operating mode

Question 26

What are the colour codes on the MFD for LFE?

Answer 26

GREEN - Inputs from FMS
CYAN - Manual inputs from the MFD, overriding the FMS inputs
CYAN - LFE input required
RED X - Invalid, out of range, or failed

Question 27

How is ram air used in the Phenom?

Answer 27

To supply fresh air to the cockpit/cabin and to decrease the bleed air temperature in the heat exchanger.
It can also supply fresh air to the cockpit and passenger cabin in the event of loss of bleed air from both engines, or in ground operations.

Question 28

How is Hot bleed air from the engines is supplied to the cabin?

Answer 28

via the heat exchanger for cooling by either RAM air or the ground cooling fan and the second path bypasses the heat exchanger to the TMVs where it is mixed with the cooled bleed air path in varying amounts according to the cabin temperature control set by the crew.

Question 29

On the MFD there are 4 pieces of information, what are they?

Answer 29

Cabin Alt
Cabin Rate
Cabin Diff
LFE