Air Conditioning & Pressurization Flashcards
Max pressure differential is?
8.7 psi
Normal pressure differential is?
8.5 psi
Max pressure differential during taxi, takeoff, and landing?
0.1 psi
Max negative pressure differential?
-0.5 psi
During single PACK operation, what is the max altitude?
700: FL310
900/900EP: FL250
What does the DISPLAY COOL or ARINC COOL Caution message mean?
Low airflow behind screens or within the avionics rack
How many pressurization controllers are installed on the CRJ900?
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 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 feet
When will the primary page indicate a CABIN ALT Warning message?
Cabin altitude >10,000 feet
When will CPAM automatically deploy the passenger oxygen masks?
Cabin altitude >14,000 feet
When will CPAM turn on the NO SMOKING/FASTEN SEATBELT signs?
Cabin altitude >10,000 feet (with switches in the AUTO position)
Can we carry live animals in the cargo compartment of the CRJ900?
Yes, in the aft cargo compartment only
