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 the outflow valve • Closes the emergency RAM AIR inlet • Closes the Avionics Ventilation Inlet and Extract valves • Closes pack flow control valves • Forward cargo isolation outlet valve (if installed) • Cargo recirculation fans stop automatically (if installed) • Closes all valves below the waterline

Question 3

How many controllers are in the pressurization system?

Answer 3

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

Question 4

How can a pilot manually switch controllers?

Answer 4

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

Question 5

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

Answer 5

Both automatic pressure controllers are faulty.

Question 6

What protects the airframe from excessive cabin differential pressure?

Answer 6

Two pressure relief valves

Question 7

When would a pilot push the ditching pushbuttons?

Answer 7

• When ditching
• When directed by the De-Icing checklist