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Systems > Air Management System > Flashcards

Air Management System Flashcards

1
Q

What does the Dump Button do

A

Provides rapid cabin depressurization, by opening the outflow valve and commanding the packs and recirculation fans to off.

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2
Q

What Systems provide air for the AMS

A

Engines and APU

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3
Q

The Engines or APU provide Air for what systems

A
  1. Engine Start
  2. Environmental
  3. Water pressurization.
  4. Cabin Pressurization
  5. Anti - Ice -> Engines Only
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4
Q

When will the system automatically just down bleed system,

A
  1. When leak, over pressure, of fault is detected.
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5
Q

The XBLD is commanded open when.

A
  1. One side has bleed air at the other side does not have any.
    2.
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6
Q

When would eng 1 bleed valve be commanded closed?

A
  • When XBLD valve fails open and the other bleed source is engine 2.
  • You pull the fire handle
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7
Q

Single pack operating altitude

A

31,000

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8
Q

When does the Ram Air vent open up

A
  1. Both packs fail and below 25k
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9
Q

What is the purpose of APU Bleed air

A
  1. ECS on the ground.
  2. Pressurization and ECS up to 15K
  3. Engine Starting.
  4. Assist with Engine starts below 21k
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10
Q

How Many AMS are there? Can 1 control the entire system

A

2 and yes

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11
Q

What is normal PSI for the system

A

45psi

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12
Q

How many fire loops does the AMS have to detect a fire

A

2 Loops, both need to detect a fire, if one fails only one needs to detect a fire.

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13
Q

When do the Recirculation Fans turn off?

A
  1. Packs are off
  2. Press the button
  3. Smoke detected in the fwd cargo bay or recirculation Bay
  4. Dump button is pressed
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14
Q

What happens when the Dump Button is pressed

A
  1. Both Packs commanded off

2. Open OFV and raises the cabin altitude to 12,400 at 2000fpm

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15
Q

What is the bleed system priority

A
  1. Onside Engine
  2. Opposite Side Engine
  3. APU
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16
Q

When will the XBLD valve open Automatically

A
  1. Only one side bleed source is detected
  2. Engine start 2 in the air
  3. Engine 1 start in the air with no APU Available.
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17
Q

What will command the Packs off

A
  1. Engine Starts
  2. System Duct Leak
  3. No bleed air available from its side.
  4. TL Set to Max Takeoff
  5. Pressing the DUMP button
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18
Q

Selecting LFE on pressurization knob– what is that?

A

Allows you to set the Landing Field Elevation manually but still using Auto mode, Cyan color

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19
Q

What color is the LFE on EICAS

A

Green Auto input

Cyan Manual input

20
Q

What engine do you start first on Air Start

A

Engine 2

21
Q

The engines provide Bleed air from what stages

A

From 6th and 10th stage

22
Q

When doing an external Air start what do you need to turn off and why?

A

The packs to prevent air contamination

23
Q

How are the Cargo Bays ventilated

A

Fwd - Receives air from the cabin than dumped over board

Aft Cargo has no air

24
Q

What happens at Cabin ALT 9,700

A

Cabin ALT HI WARNING Message

25
Q

What happens at Cabin ALT 12,400

A

OFV closes

26
Q

What happens at Cabin ALT 14,000 - 14,750

A

Oxygen masks auto drop

27
Q

How many AMS controllers are there?

A

1 controller with 2 channels

28
Q

What is external air used for?

A

Engine starting and Cabin cooling with packs off

29
Q

What is APU Bleed air used for

A
  1. Engine Starting on the ground
  2. Engine starting in the air below 21k
  3. ECS on the ground
  4. Pressurization
  5. ECS below 15k in the air
30
Q

Can engine bleed flow back into the APU

A

No A check valve protects the APU

31
Q

What is normal pressure for any engine operation

A

45psi

32
Q

Can a single bleed air power both packs?

A

Yes through the crossbreed valve

33
Q

When are the Recirc Fans commanded off

A
  1. Pressing the Dump Button
  2. Smoke in the recirc bay
  3. Cockpit switch
34
Q

Where does the CPC when landing field elevation?

A

From FMS or enter in Manually LFE button

35
Q

What is ABORT MODE

A

Cabin is scheduled back to the takeoff altitude

  1. Airplane stops climbing and begins a decent
  2. airplane has not climbed above 5000 AFE
36
Q

What color is the LFE on EICAS

A

Green - Auto - FMS

Cyan - Manual input ( M in front of LFE )

37
Q

What happens if the DUMP button is pressed in Manual mode

A

Only the Packs and Rec Fan turn off, the out flow valve do not open

38
Q

When does the safety valve open?

A

When cabin pressure exceeds 8.6 psi

39
Q

At what pressure does the negative relief valve open

A

negative .5 psi

40
Q

Can you carry Dry Ice and Animals in the forward Cargo?

A

No. Only one or the other.

41
Q

In the event of a Fire in the Forward cargo what happens?

A

A shutoff valve closes to isolate it from the cabin. and the fan turns off.

42
Q

While in Auto Mode, when does the XBLEED valve open?

A
  1. When Bleed air source is available from one side but not the other.
43
Q

When does the XBLEED Valve close when in Auto?

A

Bleed Leak is dented or Pull the fire handle.

44
Q

While in Auto mode when does the BLEED 1 or 2 close?

A
  1. Engine Fire

2. Bleed Duct leak

45
Q

When does the APU BLEED valve close?

A
  1. APU or Left bleed duct leak
  2. Anti-Ice is on
  3. Left engine bleed is available.

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