Air Conditioning, Pressurization Flashcards
1
Q
Maximum single PACKS altitude
A
31,000 feet
2
Q
What does the OVBD COOL caution mean
A
The ground valve has failed in the open position
Note: Do not takeoff with an OVBD COOL caution message. The aircraft will not be able to pressurize properly
3
Q
How many pressurization controller are installed on the CRJ 900
A
2
PC1, PC2
4
Q
When do pressurization controllers swap automatically
A
Weight on wheels plus 3 minutes or if one PC fails, the redundant controller takes over
5
Q
When operating in auto mode, what is the normal cabin rate of climb and descent
A
500 fpm climb
300 fpm decent
6
Q
When operating in maunal mode, what cabin rate of climb or descent range can be selected using the MAN RATE knob
A
50 fpm to 3000 fpm
+/- 1000 fpm
