22. CABIN PRESS Panel

Question 1

What does the DITCHING pb do?

Answer 1

Closes all valves below the waterline:
 C – Cargo Compartment Isolation Valves
 A – Avionics ventilation (inlet/extract valves)
 R – Ram air inlet
 P – Pack flow control valves
 O – Outflow valve (if in AUTO)

Question 2

Can the pilot control the outflow valve?

Answer 2

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

Question 3

How many auto pressure controllers?

Answer 3

2, only one controller operates at a time and automatic transfer occurs:
 70s after each landing
 If the operating system fails

Question 4

How do you 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 pb indicate?

Answer 5

Both automatic pressure controllers are faulty.

Question 6

The LDG ELEV selector in the AUTO position does what?

Answer 6

The pressurization system uses the FMGS data to construct an optimized pressurization schedule.

Question 7

Where does the pressurization system obtain the landing elevation from?

Answer 7

FMGC Database

Question 8

When out of the AUTO position, what is different?

Answer 8

The pressurization system uses the manually selected landing elevation.