Air Conditioning and Pressurization Flashcards
Normal pressure differential is
8.5 psi
Max pressure differential is
8.7 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
CRJ 900/900EP: FL 250
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 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 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 ft
When will the primary page indicate a CABIN ALT Warning message
Cabin altitude >10,000 ft
When will CPAM automatically deploy the passenger oxygen masks
Cabin altitude >14,000 ft
When will CPAM turn on the NO SMOKING/FASTEN SEATBELT signs
Cabin altitude >10,000 ft
with switches in the AUTO position
Can we carry live animals in the cargo compartment of the CRJ 900
Yes, Aft cargo compartment only.
