Air Conditioning And Pressurization Flashcards
Max pressure differential is ?
8.7 psi
Max pressure differential during taxi, takeoff and landing?
.1 psi
Max negative pressure differential?
-0.5 psi
During single PACK operation, what is the max altitude?
FL 250 for CRJ 900
FL 310 for CRJ 700
What does the DISPLAY COOL or ARINC COOL caution messages mean ?
Low airflow behind screens or within the avionics rack
Normal pressure differential is?
8.5 psi
How many pressurization controllers are installed on the CRJ 900?
2, PC1 and PC2
When do the pressurization controllers swap?
Weight on wheels plus 3 minutes or if one
PC fails, the redundant controller takes over
When operating in the auto mode, what is the cabin rate of climb and descent?
500 fpm climb
300 fpm descent
When operating in the manual mode, what range is controlled by MAN rate knob?
50 fpm to 3000 fpm
+ or - 1000 fpm
When will the primary page indicate a CABIN ALT CAUTION message?
Cabin altitude between 8,500 and 10,000 ft
When will the primary page indicate a CABIN ALT WARNING message?
Cabin altitude > 10,000 ft
When will CPAM automatically deploy passenger oxygen masks?
Above 14,000
When will CPAM turn on the NO SMOKING /FASTEN SEAT BELTS sign?
Cabin altitude > 10,000 ft with switches in auto position
Can we carry live animals in the cargo compartment of the 900?
Yes- aft cargo compartment only
