Air Management System Flashcards

1
Q

What are the two components of the AMS?

A

The pneumatic system
Environmental control system (ECS)

Cabin pressure control system is included but has a separate controller

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2
Q

The AMS controller provides primary control for what systems? (5)

A
Bleed control
Environmental control
Hot air leak detection
Crew O2 Monitoring
Wing and engine ice protection
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3
Q

(T/F) The two channels are independent of one another and should one fail the entire channel is lost

A

False. Both channels can fully cover the other, should one fail

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4
Q

What are all the sources for pneumatic air?

A

Engine bleed air
APU bleed air
External pneumatic source

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5
Q

The pneumatic air is used for what 4 jobs?

A

Engine starting
Anti Ice system
Environmental control system
Water pressurization system

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6
Q

Low pressure bleed air comes from what stage of the engine?

A

Stage 6

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7
Q

High pressure bleed air comes from what stage of the engine?

A

Stage 10

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8
Q

What is the purpose of the low stage bleed check valve

A

Prevents reverse flow of high pressure bleed air back into the engine at the low pressure supply port

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9
Q

The engine bleed valve regulates pressure at __ power settings

A

High

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10
Q

What does a white bar on either engine bleed buttons, or the APU bleed button mean?

A

The check valves are closed and the system is not supplying pneumatic air

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11
Q

If more than one bleed air source is available the AMS logic uses what priority?

A

Onside engine
Opposite engine
APU, if available

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12
Q

(T/F) The APU bleed air can be used for the anti ice system in flight

A

False

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13
Q

The ECS packs 1 and 2 shall be closed if any of what conditions exist? (7)

A
  • A bled air source is not available for the pack
  • The respective pack button is off
  • Any engine is starting and weight-on-wheels is true
  • The respective engine is starting, wight-on-wheels is false and the opposite engine is not starting
  • Any engine is starting AND APU is the bleed source
  • Respective bleed system duct leak
  • Respective packs BIT shutdown failures are present (PACK 1(2) FAIL EICAS message displayed)
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14
Q

The two ECS packs are installed where?

A

In the two wing to fuselage fairing

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15
Q

The air reaching the cockpit and cabin is approximately __% fresh air and __% recirculated air

A

52% fresh

48% Recirculated air

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16
Q

The recirculation fans will automatically turn off if ___ or ___

A

The pressurization dump button is pressed

or, smoke is detected in the recirculation bay

17
Q

The gasper shutoff valve will automatically open whenever the gasper air supply exceeds __C (__F)

A

35 C

95 F

18
Q

(T/F) Live animals can be placed into both cargo bays

A

False. They must be in the FWD cargo bay because it is the only one with a recirculation fan

19
Q

The pack 1 ram air valve will automatically open when: (3)

A

The airplane is in flight
Pack 1 and 2 are commanded OFF or failed
The airplanes flight altitude is less than 25,000 feet

20
Q

(T/F) Passenger cabin temperature must be controlled by the pilots

A

False. The pilots can select manual FA control on the ECS panel

21
Q

The Cabin Pressure Control System (CPCS) 5 main components are:

A
Cabin Pressure Controller (CTR)
Cabin outflow valve
Negative pressure relief valve
Positive pressure relief valve
Static port
22
Q

The positive pressure relief valve opens independently whenever differential pressure exceeds ___ PSID

A

8.8 PSID

23
Q

The negative pressure relief valve limits the negative differential pressure to ___ PSID

A

-0.5 PSID

24
Q

A CABIN ALTITUDE HI message illuminates whenever the cabin altitude is above ____ ft

A

9,700

25
Q

The dump button will depressurize the cabin at a rate of ____ FPM up to ____ ft

A

2000 FPM up to 12,400 ft

26
Q

(T/F) If pressurization dump button is pressed a second time, the system will return to normal operation

A

True

27
Q

(T/F) In manual mode there is still automatic cabin depressurization on the ground (after landing)

A

False

28
Q

PRESN AUTO FAULT means what?

A

One of the two controllers on the cabin pressure controller (CTR) has failed, but the other is still fuctioning

29
Q

PRESN AUTO FAIL

A

Both controllers on the cabin pressure controller (CTR) have failed