Air Management System Flashcards
Where does the AMS gets its air from
Engines bleed
APU bleed
Ground cart
What is the engine bleed air used for
ECS
The anti-ice
Water pressurization
Engine start
What is the APU bleed used for
Engine start
ECS
Water pressurization
Pressurization
What stages is bleed air from
Low port stage 6
High port stage 10
Max altitude for single pack operation
31000 feet
What is external pneumatic air used for
Ecs on the grounds
Engine start on the ground
Can engine bleed flow back to the APU
No. Check valve prevents it
What is the precooler
Cools the bleed air from the engine to the AMS
What cools the precoler
Ground
N1 fan
Can a single bleed source provide power to both packs
Yes using the cross bleed
When are the recirculation fans commanded off
Cockpit switches Smoke detected in the recirculation bay Dump button pressed Respective pack is off Fire detection in the cargo bay
What keeps the electronic bay cool
Fwd and ctr ( 3 fans pulling air from cabin) Aft bay ( natural flow from cabin)
How many channels in the cabin pressure control
- ( one active the other stand by)
What happens when the dump button is pressed
Packs off
Recirculation fan off
Ram air open
OFV valve fully open until 12400 feet cabin altitude
When will the cross bleed automatically open
Only one side bleed source is available
Engine 2 start in the air if APU is not available
APU bleed button pushed out for engine start
