Pressurisation

Question 1

In single engine operations, when might the APU bleed be available?

Answer 1

When engine 2 has failed

Question 2

With the loss of both FMGCs, how will the pressurisation obtain the landing elevation, what is the procedure?

Answer 2

You have to select it yourself

Question 3

With the loss of CPC 1 and 2, how is the cabin altitude controlled?

Answer 3

You have to do it manually

Question 4

When using the MAN V/S toggle, what happens to the outflow valve when the toggle is selected up?

Answer 4

It opens (check)

Question 5

What is the ram air used for, what is its purpose?

Answer 5

Ventilates the cockpit and cabin to remove smoke or if both packs fail. When the Ram Air push button is press, the outflow valve opens 50% provided it is under automatic control. If manual is selected, it won’t open

Question 6

How many motors drive the outflow valve and why?

Answer 6

3
2 automatic motors, 1 manual motor incase the automatic motors fail

Question 7

On takeoff, why does the pressurisation system Slightly pressurise the cabin.

Answer 7

To avoid a pressure surge at rotation, the controller pre-pressurises the A/C at 400ft/min until 0.1 PSI

Question 8

What is the purpose of the residual pressure control unit

Answer 8

Automatically depressurises the A/C in case of residual pressure on ground. It automatically opens the outflow valve when:
1. The outflow valve is not fully open
Both CPC are failed or manual mode is selected and
2. The A/C is on the ground and
3. All engines are shutdown or all ADIRS indicate an airspeed below 100kt