Cabin Pressure Panel - Rev 01

Question 1

Which valves will receive a close command when the DITCHING push button is depressed?

(FCOM-DSC-21-20-30)

Answer 1

ARPO

Avionics Inlet and Extract valves

Ram air inlet

Pack Flow Control valves

Outflow valve (only if in AUTO mode)

Question 2

Will the DITCHING push button always close the outflow valve?

(FCOM-DSC-21-20-40)

Answer 2

Not if the outflow valve is under manual control

Question 3

Can the pilot control the outflow valve?

(FCOM-DSC-21-20-30)

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?

(FCOM-DSC-21-20-30)

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?

(FCOM-DSC-21-20-40)

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 push button indicate?

(FCOM-DSC-21-20-40)

Answer 6

Both automatic pressure controllers are faulty

Question 7

From what source does the pressurization system obtain landing elevation?

(FCOM-DSC-21-20-40)

Answer 7

FMGC database

Question 8

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

(FCOM-DSC-21-20-40)

Answer 8

Manually by selecting landing elevation via the LDG ELEV dial

Question 9

What protects the airframe from excessive cabin differential pressure?

(FCOM-DSC-21-20-20)

Answer 9

2 pressure relief valves (safety valves)

Question 10

How many outflow valve motors are installed?

(FCOM-DSC-21-20-20)

Answer 10

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

Question 11

Describe what occurs when cabin pressure altitude exceeds:

8800 ft

9550 ft

11300 ft

14000 ft

(FCOM-DSC-21-20-40, FCOM-DSC-21-20-50, FCOM-DSC-33-40-10, FCOM-DSC-35-30-10)

Answer 11

8,800 ft - CAB ALT flashes

9,550 ft - EXCESS CABIN ALT warning

11,300 ft - All cabin signs illuminate

14,000 ft - All passenger masks deploy