Pressurization Flashcards
How is cabin pressurization normally maintained…
By controlling the amount of air escaping from the cabin
What are the 3 normal pressurization modes….
- ground taxi
- pressurization during taxi
- flight mode and landing mode
How is the pre pressurization mode being activated…
Advance both throttles above N2 85% on the ground
By what 3 modes the outflow valves are opened to reduce cabin pressure…
- by the AUTO controller
- by the CABIN DUMP switch
- by the MANUAL switch and using the red knob to control outflow
The two outflow valves are closed to increase cabin pressure by….
- AUTOMATIC control
- MANUAL and red knob
If vacuum in cabin becomes uncontrolled in flight, what happens with cabin pressure….
Cabin rapidly climbs but does not exceed 14500 ft +-500ft
Source of bleed air for cabin pressurization when the EMER PRESS ON (either selected on by the AIR SOURCE SELECT switch or by the emergency pressurization mode) annunciator is illuminates in flight….
Either or both engines
State the two DC powered pressure controller modes….
- isobaric mode (result of loss of ADC 1 input)
- AUTO mode
If the ADC 1 fails then…
The pressurization controller amber light illuminates and SET ALT window changes to FL isobaric mode
Prior to take off , the pilot sets the pressurization controller to….
The destination field elevation
The pressurization controller continuously generates auto schedule signals in flight , based on…
- departure field elevation
- maximum altitude reached
- pilot input of destination elevation
On the ground, with either engine operating below 85% N2, what happens with the cabin outflow valves…
Both outflow valves remain open
Operating in high altitude mode of operation, what happens with the cabin…
Cabin altitude climbs and remains at aprox 8000 FT while the aircraft is above 25000 ft
