CABIN PRESS Panel

Question 1

How is the landing field elevation entered into the pressurization system in automatic, semi-
automatic and manual modes?

Answer 1

• Automatic = FMGC (LDG ELEV must be in AUTO)
• Semi-automatic = by LDG ELEV selector button
• Manual = By selecting the MODE SEL to MAN and then using the MAN V/S CTL toggle switch

Question 2

What does selecting the DITCHING pushbutton ON accomplish?

Answer 2

Closes all openings below the waterline

Note: If you lose both cabin pressure systems 1 + 2, you have to manually close the outflow valve.

Question 3

When would a pilot push the ditching pushbutton?

Answer 3

• When ditching
• When directed by the deicing checklist

Question 4

How many controllers are in the pressurization system?

Answer 4

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

Question 5

How can a pilot 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

What protects the airframe from excessive cabin differential pressure?

Answer 7

Two pressure relief valves