Air Conditioning/Pressurization Flashcards
Max pressure differential?
8.7 psi
Normal pressure differential is?
8.5 psi
Max pressure differential during ground ops?
0.1 psi
Max negative pressure differential?
-0.5 psi
During single PACK operation, what is the max altitude?
CRJ 900: FL 250
CRJ 700: FL 310
What does the DISPLAY COOL or ARINC COOL caution messages mean?
Low airflow behind screens or within the avionics rack
How many pressurization controllers are installed in the CRJ?
2, PC1 and PC2
When do the pressurization controllers swap?
Weight on wheels plus three minutes or if one PC fails the redundant controller will take over
When operating in auto mode, what is the cabin rate of climb and descent?
500 fpm climb and 300 fpm descent
When operating in manual mode, what range is controlled by the MAN RATE knob?
50 fpm to 3000 fpm +/- 1000 fpm
When will the primary page indicate a CABIN ALT caution message?
Cabin altitude between 8,500 and 10,000
When will the primary page indicate a CABIN ALT warning message?
Cabin altitude greater than 10,000
When will CPAM automatically deploy the passenger oxygen masks?
Cabin altitude >14,000
When will CPAM automatically turn on the fasten seat belt/no smoking signs?
Cabin pressure altitude above 10,000 ft
Can we carry live animals in the cargo compartment?
Yes, aft cargo compartment only
