Air Conditioning/Pressurization Flashcards Preview

CL-65 Study Guide > Air Conditioning/Pressurization > Flashcards

Flashcards in Air Conditioning/Pressurization Deck (17):
0

Normal pressure differential is?

8.5 psi

1

Max pressure differential?

8.7 psi

2

Max pressure differential during ground ops?

0.1 psi

3

Max negative pressure differential?

-0.5 psi

4

During single PACK operation, what is the max altitude?

CRJ 900: FL 250
CRJ 700: FL 310

5

What does the DISPLAY COOL or ARINC COOL caution messages mean?

Low airflow behind screens or within the avionics rack

6

How many pressurization controllers are installed in the CRJ?

2, PC1 and PC2

7

When do the pressurization controllers swap?

Weight on wheels plus three minutes or if one PC fails the redundant controller will take over

8

When operating in auto mode, what is the cabin rate of climb and descent?

500 fpm climb and 300 fpm descent

9

When operating in manual mode, what range is controlled by the MAN RATE knob?

50 fpm to 3000 fpm +/- 1000 fpm

10

When will the primary page indicate a CABIN ALT caution message?

Cabin altitude between 8,500 and 10,000

11

When will the primary page indicate a CABIN ALT warning message?

Cabin altitude greater than 10,000

12

When will CPAM automatically deploy the passenger oxygen masks?

Cabin altitude >14,000

13

When will CPAM automatically turn on the fasten seat belt/no smoking signs?

Cabin pressure altitude above 10,000 ft

14

Can we carry live animals in the cargo compartment?

Yes, aft cargo compartment only

15

What causes the FAULT portion of a PACK switchlight to illuminate?

Over pressure/ over temperature condition

16

What causes the FAULT portion of the PRESS CONT switchlight to illuminate?

Both pressure controllers have failed