E-170/175 Air Management System

Question 1

What is part of the Air Management System?

WHEEEP

Answer 1

• Water pressure
• Hot air leak detection
• ECS
• Engine Start
• Engine and wing Anti-ice
• Pressurization

Question 2

Pressurization system consist of?

Answer 2

• Cabin outflow valve
• Static pressure port
• Negative pressure relief valve
• Positive pressure relief valve
• Cabin pressure controller

Question 3

What provides air for the AMS?

Answer 3

• Engine bleeds
• APU bleeds
• External pneumatic source

Question 4

What is external pneumatic air used for?

Answer 4

• ECS on the ground

* Engine start on the ground

Question 5

Where is the external ground source panel located?

Answer 5

• Lower fairing between the wings

Question 6

What is the primary use for APU bleed air?

Answer 6

• ECS on the ground
• Engine start on the ground
• Assist with engine start (< FL210)
• Bleed source for pressurization, heating and cooling (< 15,000 ft MSL)

Question 7

How many bleed regulating valves are in each engine?

Answer 7

• 2

1 high stage bleed and 1 engine bleed

Question 8

How would an APU or engine bleed button show a detected leak?

Answer 8

• An amber light illuminates

Question 9

What does the overheat detection system (ODS) observe? PEAT

Answer 9

• Engine bleeds, packs (AC ducts)
• APU bleed
• Plumbing for the wing and engine anti icing system
• Trim air

Question 10

How many ECS packs are on the aircraft? What provides air for the pack?

Answer 10

• 2 independent packs (left and right)

* Each engine provides bleed air to its respective pack

Question 11

Can a single pack provide adequate temperature control and pressurization?

Answer 11

• Yes up to FL310

Question 12

What is the max altitude for a single pack operation?

Answer 12

• FL310

Question 13

Where do the packs distribute air to?

Answer 13

• Pack 1- flight deck/cabin

* Pack 2- cabin

Question 14

Can a single bleed source power both packs?

Answer 14

• Yes, through a crossbleed valve

Question 15

How many recirculation fans recirculate air back into the cabin/flightdeck?

Answer 15

• 2

Question 16

Which cargo bays have ventilation fans?

Answer 16

• Forward

Question 17

What cargo compartment may we transport live animals?

Answer 17

• Forward because it has air recirculation

Question 18

Pushing out the RECIRC buttons turns off?

Answer 18

• Both recirculation fans

Question 19

Can the APU bleed be used for the anti ice system?

Answer 19

• No

Question 20

What happens when the XBLEED button on the panel is pushed out?

Answer 20

• It manually closes the crossbleed valve

Question 21

The DUMP switch is used for?

Answer 21

• Emergency evacuation
• Fast cabin depressurization
• Smoke evacuation

Question 22

What happens when the DUMP button is pressed?

Answer 22

• Sets the ECS packs and recirculation fans to OFF.
• Controls the outflow valve to maintain the cabin altitude rate of climb at 2000 ft/min up to 12,400 ft.
• When the cabin altitude reaches 12,400 ft it commands the outflow valve full closed.

Question 23

With respect to the DUMP button, which functions are available in Manual mode?

Answer 23

• When pressed, packs and recirc fans will shut down.

Question 24

Why does the DUMP button have a red-raised border around it?

Answer 24

• So you can find it in low visibility conditions in the flight deck.

Question 25

The Outflow valve can be modulated ________ or ________?

Answer 25

• automatically or manually

Question 26

The MAN mode position allows manual control of:

Answer 26

• Outflow valve

Question 27

How can you determine the position of the outflow valve?

Answer 27

• There is a pointer on the outflow valve position indicator on the environmental control system (ECS) synoptic page on the MFD.

Question 28

In the Manual mode, will the cabin depressurize on landing?

Answer 28

• No.

Question 29

What are the DOWN/UP positions used for on the CABIN ALT selector knob?

Answer 29

• Manually closes/opens the outflow valve to decrease/increase cabin altitude.

Question 30

What is the LFE CTRL selector position on the pressurization MODE selector knob used for?

Answer 30

• If not available from the FMS data base, allows manual input of the landing field elevation.

Question 31

Is the pressurization system still in the AUTO mode when LFE is entered manually?

Answer 31

• Yes.

Question 32

Where does the CPC get Landing Field Elevation (LFE)?

Answer 32

• FMS and if not available from the FMS data base, LFE must be manually selected on the pressurization panel.

Question 33

How would you manually control the LFE?

Answer 33

• Momentarily move the LFE selection knob UP or DOWN.

Question 34

How is a manual input for LFE displayed on EICAS?

Answer 34

• A cyan “M” in front of the altitude readout.

Question 35

What does the ATTND position do on the PAX CABIN knob?

Answer 35

• Switches over the cabin temperature control to the Flight Attendant control panel(s).

Question 36

What is the memory item for Cabin Altitude Hi?

Answer 36

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