Pressurization

Question 1

Auto control of cabin pressurization needs 3 components to be functioning in order to work, what are those components??

Answer 1

Main Bus DC current

Information from ADC

Bleed Air for outflow valves

Question 2

The NORM/ALT SEL switch when set to NORM provides what kind of function when in auto?

Answer 2

NORM mode controls cabin pressure on a pre-programmed schedule.

Question 3

What is the highest normal differential pressure when cabin control is in AUTO? What is MAX cabin differential pressure?

Answer 3

Normal = 9.3 psi
Max = 9.7 psi

Question 4

What are three different ways the cabin control will change from AUTO to MANUAL?

Answer 4

1. Select Manual
2. FAULT on auto control
3. Load shed into EMER BUS

Question 5

What happens when in AUTO and the cabin reaches 8,500ft?

Answer 5

Amber “CABIN ALTITUDE” CAS message will appear

Question 6

What happens when in AUTO and the cabin reaches 10,000ft?

Answer 6

A red “CABIN ALTITUDE” CAS message will appear.

Question 7

What happens when in AUTO and the cabin reaches 14,000ft?

Answer 7

A red “EMERGENCY DESCENT” CAS message will appear.

Question 8

What happens when in AUTO with AUTO PILOT engaged, and the cabin reaches 14,500ft?

Answer 8

1. Cabin altitude limiters engage.
2. Auto pilot will enter and fly the Emergency Descent Mode on the FGC.
3. PAX O2 masks deploy (if in auto)

Question 9

What happens when in AUTO and in “high altitude mode when the cabin reaches 10,000ft?

Answer 9

A cyan “CABIN ALTITUDE” CAS will be displayed until cabin reaches 9650 ft for more than 30 minutes. Then the CAS message will change Amber color.