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 is?

8.7 psi

2

Max pressure differential during taxi, takeoff, and landing?

0.1 psi

3

Max negative pressure differential?

-0.5 psi

4

During single PACK operation, what is the max altitude?

700: FL310
900/900EP: FL250

5

What does the DISPLAY COOL or ARINC COOL Caution message mean?

Low airflow behind screens or within the avionics rack

6

How many pressurization controllers are installed on the CRJ900?

2, PC1 and PC2

7

When do the pressurization controllers swap?

Weight on wheels plus 3 minutes or if one PC FAILS, the redundant controller takes over

8

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

500 fpm climb
300 fpm descent

9

When operating in the 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 feet

11

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

Cabin altitude >10,000 feet

12

When will CPAM automatically deploy the passenger oxygen masks?

Cabin altitude >14,000 feet

13

When will CPAM turn on the NO SMOKING/FASTEN SEATBELT signs?

Cabin altitude >10,000 feet (with switches in the AUTO position)

14

Can we carry live animals in the cargo compartment of the CRJ900?

Yes, in the aft cargo compartment only

15

What causes then FAULT portion of the PACK switch light to illuminate?

Over pressure or over temperature condition

16

What causes the FAULT portion of the PRESS CONT switch light to illuminate?

Both pressurization controllers have failed