E190 PNEUMATICS

Question 1

The pneumatic system provides bleed air to

Answer 1

The engine starter
Anti ice system
ECS
Water pressurization

Question 2

Within the engines, Bleed air comes from

Answer 2

LP and HP stages

Question 3

At low power settings, bleed air is regulated by the

Answer 3

The high-stage bleed valve

Question 4

At high power settings the bleed air is regulated by

Answer 4

The engine bleed valve

Question 5

What cools and regulates the bleed air?

Answer 5

The pre-cooler

Question 6

How does the precooler work?

Answer 6

It cools the bleed air using engine fan air

Question 7

If a bleed leak is detected, will the plane shut down the respective bleed system?

Answer 7

Yes

Question 8

If more than one bleed source is available, the AMS logic priority is:

Answer 8

1. Onside engine
2. Opposite engine
3. APU

Question 9

Can you use APU bleed air for operation of the anti ice system in flight?

Answer 9

No

Question 10

When would you need to use “LFE CTRL” knob?

Answer 10

If FMS 1 and 2 INOP or…

Landing at an airport not in the database

Question 11

Will the system still pressurize automatically if using LFE CTRL?

Answer 11

Yes

Question 12

When the mode switch is moved to LFE CTRL what does this action allow?

Answer 12

Manual input of landing field elevation via the LFE knob

Question 13

In flight what will happen if the dump button is pushed in?

Answer 13

In auto:
- packs and review fans turn off
- outflow valve modulate to raise the cabin to 12.4k at 2000FPM
- natural leak will bring cabin alt above 12.4k if plane is higher
In manual:
- packs and record fans turn off

Question 14

Can the cabin dump be cancelled if it has already been pushed in?

Answer 14

Yes. Just push it out.

Question 15

On ground with APU and engines running, which pneumatic sources has priority for supplying bleed air to the packs?

Answer 15

AMS gives priority to the engines

Question 16

In flight what is the bleed priority of the AMS?

Answer 16

Respective side
Opposite side
APU

Question 17

In flight what happens when you push a bleed button out?

Answer 17

Closes the bleed

Question 18

If you turn off a bleed does it turn off the respected pack?

Answer 18

No

Question 19

What happens to the pack when you turn off a bleed?

Answer 19

XFEED valve would open and cross side bleed would supply both packs

Question 20

Smoke detected in the recirc bay, what components are affected?

Answer 20

Recirc fans are commanded OFF

Question 21

What conditions would command PACKS 1 & 2 automatically to OFF?

Answer 21

1) DUMP button pressed
2) thrust levers MAX
3) during takeoff with REF ECS OFF and APU is off

Question 22

If you select REF ECS OFF in MCDU and APU is off will the pack valves be open for takeoff?

Answer 22

No, unpressurized takeoff will take place

Question 23

During takeoff you encounter wind shear. After selecting MAX POWER what happens to your packs?

Answer 23

They turn off