CABIN PRESSURE PANEL

Question 1

Which valves will receive a close command when the DITCHING pushbutton is depressed

Answer 1

a. Avionics Inlet and Extract valves
b. Ram air inlet
c. Pack Flow Control valves
d. Outflow valve (only if in AUTO mode)

Question 2

Will the DITCHING pushbutton always close the outflow valve?

Answer 2

Not if the outflow valve is under manual control

Question 3

Can the pilot control the outflow valve?

Answer 3

Yes, select MAN on the MODE SEL and use the MAN V/S CTL switch

Question 4

How many controllers are in the pressurization system?

Answer 4

2, only one is used at a time and they swap roles after each landing

Question 5

How do you manually switch controllers?

Answer 5

Switch MODE SEL to MAN for 10 seconds, then back to AUTO

Question 6

What does an amber FAULT light in the MODE SEL pushbutton indicate?

Answer 6

Both automatic pressure controllers are faulty

Question 7

From what source does the pressurization system obtain landing elevation?

Answer 7

FMGC database

Question 8

When the mode selector is out of the AUTO position, how do you set a landing elevation?

Answer 8

Manually by selecting landing elevation via the LDG ELEV dial

Question 9

What protects the airframe from excessive cabin differential pressure?

Answer 9

2 pressure relief valves (safety valves)

Question 10

How many outflow valve motors are installed?

Answer 10

3 – One for each automatic controller and one for manual control

Question 11

Describe what occurs when cabin pressure altitude exceeds:

Answer 11

a. 8,800 ft - CAB ALT flashes
b. 9,550 ft - EXCESS CABIN ALT warning
c. 11,300 ft - exit signs illuminate
d. 14,000 ft - passenger masks deploy