A320 Lounge Ventilation

Question 1

Which ventilation modes are available on the ground?

Answer 1

Open or closed

Plus blower or extract override and smoke

Question 2

Which ventilation modes are available in flight?

Answer 2

Closed or intermediate

Plus blower or extract override and smoke

Question 3

Which computers are associated with the ventilation system?

Answer 3

AEVC

Fan Speed Controller

Question 4

What does AEVC stand for?

Answer 4

Avionic Equipment Ventilation Controller

Question 5

What does the AEVC do?

Answer 5

Controls all fans and valves

Question 6

What does the Fan Speed Controller do?

Answer 6

Controls speed of blower and extractor dependant on temperature of equipment

Question 7

What inputs are there to the Fan Speed Controller?

Answer 7

We have no input on this

Question 8

On the ground, is the ventilation system open or closed when it is hot?

Answer 8

Open

Question 9

On ground, when will the ventilation system change from the open to closed configuration?

Answer 9

When the temperature is decreasing and reaches 9 degrees

Question 10

On ground, when will the ventilation system change from the closed to open configuration?

Answer 10

When the temperature is increasing and reaches 12 degrees

Question 11

How is the ventilation system set up in the open configuration?

Answer 11

Inlet and outlet both open

Everything else closed

Theory is that external air enters the ventilation system and is sent through the avionics equipment and out overboard

Question 12

How is the ventilation system set up in the closed configuration?

Answer 12

Inlet and outlet both shut

Avionics bay open
Skin Air Isolation Valve open
Cargo Underfloor open

Theory is that the aircraft is cool enough, so air circulates around the cool aircraft skin, and is then vented into the cargo and underfloor compartments

Question 13

In the air, when will the ventilation system change from the intermediate to closed configuration?

Answer 13

When the temperature is decreasing and reaches 32 degrees

Question 14

In the air, when will the ventilation system change from the closed to intermediate configuration?

Answer 14

When the temperature is increasing and reaches 35 degrees

Question 15

Are we normally in the intermediate configuration or closed configuration in the air?

Answer 15

Closed, as this is the configuration for cold temperatures, which it normally is in the air

Question 16

How is the ventilation system set up in the intermediate configuration?

Answer 16

Inlet and outlet both shut, however there is a small flap in the outlet valve which is open

Avionics bay open
Skin Air Isolation Valve open
Cargo Underfloor open

Theory is that the aircraft is not wanting to lose pressurisation so only a small flap lets air out

Question 17

How are the extract and override buttons set up in the smoke configuration?

Answer 17

Both to override

Question 18

How can we tell from the overhead panel if smoke has been detected in the avionics?

Answer 18

Fault light on the extract and override push buttons

Question 19

What is the theory of the smoke configuration?

Answer 19

All valves close except for the air conditioning valve and the small flap in the outlet valve, so air conditioned air enters the avionics and then is extracted via the outlet flap, removing the smoke.

The Skin Exchange Isolation Valve is closed as we dont want to reintroduce smoke to the avionics

Question 20

What is the valve setup in the blower or extract mode?

Answer 20

Air conditioning valve open and skin exchange isolation valve open. All other valves closed

Question 21

When the extract pushbutton is normal, is the extract fan on or off?

Answer 21

On

Question 22

When the extract pushbutton is in override, is the extract fan on or off?

Answer 22

On