Pneumatics Flashcards
Can love animals be in cargo?
In the front.
Components of the cabin pressure system
Cabin pressure controller.... CTR One outflow valve One negative pressure relief valve One positive pressure relief valve One static port
When does positive pressure relief valve open?
When diff pressure exceeds 8.6
What is the differential protection provided by the negative pressure relief valve?
Limits negative diff to -0.5 psi
Cabin will go to what max if dump button is pushed?
12,400… This is used for smoke removal or EMER evacuation
How is landing field elevation set?
In the Fms. If it is not avail then mode rotar switch is set to LFE and it can be set on overhead panel.
When will LFE auto go to departure field?
If present pressure alt is below 10,000 feet or 5,000 above field elevation
When does the cabin high alt warning come on?
9,700 feet.
What happens of dump button pressed a second time?
System returns to normal operation.
Can cabin go higher than 12,400?
Yes, by using the manual mode.
What happens in manual mode on the ground?
There is not automatic cabin depressurization.
When will recirculating fans automatically turn off?
If dump button is pushed or smoke is detected in the recirculation bay.
What is a a controller?
Air management system.
Air sources?
Engine, APU or external…. Huffed cart of air condition nose
Locations of high and low bleed air?
Sox and tenth stage.
Bleed buttons in what happens?
AMS automatically regulates bleed air demand.
What happens when high pressure air is being used?
A valve in stage six prevents high pressure air from back flowing into stage six.
What closes the APU air valve?
Either auto as needed by system of push out APU bleed valve to do manually.
Bleed air leak protection
Dual loops along side of bleed air line. If one is detected the bleeds on detected side shut down and yellow bar will illuminate on the bleed air bar.
What is the AMS priority for using bleed air?
On side engine, off side engine and APU if available. APU cannot be used for anti ice.
Engine bleeds open when?
Set to auto
Engine bleed is avail
Mixture of air with recirculation fan running
52 % fresh and 48 recycled
Ram air auto when?
Both packs off or failed, and altitude is less than 25,000
What is CPCS
cabin pressure control system
