PRESSURISATION

Question 1

How many automatic cabin pressure controllers (ACPC’s) are there?

Answer 1

2 ACPC’s

Question 2

How many motors can drive the OutFlow Valve (OFV)?

Answer 2

2 automatic motors, 1 manual

Question 3

What causes the safety valve of the pressurization system to operate?

Answer 3

An over or under pressure

> 8.6 PSI diff press

Question 4

What is the OFV position on the ground?

Answer 4

Fully OPEN when in the ground mode

Question 5

What is the OFV position during the take off run?

Answer 5

This is the pressurization phase:

Regulates the differential pressure with -400’/min

Question 6

During climb the cabin rate of climb is a function of what?

Answer 6

Actual rate of climb

For descent, the system takes into account the ADIR’s pressure info + lading elevation + QNH at destination

Question 7

What is the approximate maximum rate of descent of the cabin in AUTO?

Answer 7

+/- 750 ft/min

Question 8

What happens with the OFV after touchdown?

Answer 8

OFV fully OPENs

Question 9

IF the MAN V/S CTL is moved UP, what happens with the DIFF PRESS / CABIN V/S / CABIN ALT / OFV position?

Answer 9

Decreases/increases/increases/opens

Question 10

What does the ditching switch do?

Answer 10

In AUTO, it closes all the openings below the flotation line

OFV / RAM AIR / AVIONIC’s INLET/EXTRACT / PACK CTRL VALVES

Question 11

When is CABIN V/S displayed on the DOORS SD page?

Answer 11

If cabin is climbing or descending in flight