Air Management System Flashcards Preview

E170 > Air Management System > Flashcards

Flashcards in Air Management System Deck (22):
1

What does the air management system consist of

Pneumatic system
Environmental control system
Cabin pressure control system

2

Where does the AMS gets its air from

Engines bleed
APU bleed
Ground cart

3

What controls the AMS

The SPDA 2

4

What is the engine bleed air used for

ECS
The anti-ice
Water pressurization
Engine start

5

What is the APU bleed used for

Engine start
ECS
Water pressurization
Pressurization

6

What stages is bleed air from

Low port stage 6
High port stage 10

7

Max altitude for single pack operation

31000 feet

8

What is external pneumatic air used for

Ecs on the grounds
Engine start on the ground

9

Can engine bleed flow back to the APU

No. Check valve prevents it

10

What is the precooler

Cools the bleed air from the engine to the AMS

11

What cools the precoler

Ground
N1 fan

12

Can a single bleed source provide power to both packs

Yes using the cross bleed

13

Ratio of fresh air to recirculated air

52% fresh
48% recirculated

14

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

15

What keeps the electronic bay cool

Fwd and ctr ( 3 fans pulling air from cabin)
Aft bay ( natural flow from cabin)

16

How many channels in the cabin pressure control

2. ( one active the other stand by)

17

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

18

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

19

How does bleed air is cooled before being used

N1 bleed air which is cooler on the ground

20

When will the positive relieve valve automatically open

8.6 psi

21

Cabin pressure limit

Below 37000 7.8 psi D
Above 37000 8.4 psD

22

At what altitude will mask drop

14000