EMB120 Pressurization Flashcards
How does the aircraft meter the pressure in the aircraft?
lets air out of the out flow valves
How many flow valves are there?
2 total
1 is pneumatic
1 is electro-pneumatic
What valve is slaved to which in auto mode?
the pneumatic valve is slaved to the electro-pneumatic
Which valve is being used in manual mode?
only the pneumatic
When does the cabin pressurize?
it pressurizes to 300ft below field elevation on the TO roll
What is the negative pressure differential max?
-0.30psi
When does the cabin altitude light turn on
10,000ft
what is the pressure alt limited to if the valves fail?
13000 +- 1500
When does the cabin pressure begin to climb on TO
15 sec after the gear is up
What alt do we set the cabin to when descending?
300 ft below field elevation
What alt do we set the cabin prior to the flight?
1000 ft above cruise
How fast does the cabin climb or decend while rate knob is in the detent?
650fpm up
450fpm down
What happens when the cabin is dumped?
Rapidly decompress cabin
Cabin claims to 13000
