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Airbus Alaska > SH Chapter 2 - Air Systems > Flashcards

SH Chapter 2 - Air Systems Flashcards

1
Q

1) Which valves will receive a close command when the DITCHING pushbutton is depressed (ARPO)?

A
  • Avionics ventilation inlet & outlet fans
  • Ram Air inlet
  • Pack flow control valves
  • Outflow valve
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2
Q

2) Will the DITCHING pushbutton always close the outflow valve?

A

No. Only when the pressurization mode is in Auto

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3
Q

3) Can the pilot control the outflow valve?

A

Yes. When MODE SEL pb in MAN (manual pressurization mode)

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4
Q

4) How many controllers are in the pressurization system?

A

Two. Identical digital pressurization controllers (CPCs)

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5
Q

5) How do you manually switch controllers?

A

Switching to MAN for at least 10 seconds, then back to Auto (MODE SEL pb on CABIN PRESS panel)

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6
Q

6) What does an amber FAULT light in the MODE SEL pushbutton indicate?

A

Both CPCs have failed

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7
Q

7) From what source does the pressurization system obtain landing elevation?

A

Auto - FMGC 1

Semi Auto - LDG ELEV Knob

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8
Q

8) When the mode selector is out of the AUTO position, how do you set a landing elevation?

A

Turning the LDG ELEV knob to field elevation and confirming on ECAM panel.

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9
Q

9) What protects the airframe from excessive cabin differential pressure?

A

Safety valves (two independent valves)

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10
Q

10) How many outflow valve motors are installed?

A

Three. Two for automatic and one for manual.

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11
Q

11) What happens to the pack flow rate when APU bleed air is in use or during single pack operation?

A

System provides higher flow rate

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12
Q

12) When should the PACK FLOW selector not be in the normal position?

A

With less than 115 pax - LO
Hot or humid conditions - HI
Or as directed for smoke ventilation

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13
Q

13) If the engine bleed air in-flight is too low what will occur?

A

Controller sends a signal to both Engine Interface Units (EIUs) to increase minimum idle and raise bleed pressure

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14
Q

14) What would cause an amber FAULT light to illuminate in the PACK 1 and/ or Pack 2 pushbutton (OOD)?

A
  • Pack outlet overheat
  • Compressor outlet overheat
  • Pack outflow valve position disagrees with selected position
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15
Q

15) At what cabin differential pressure does the RAM AIR valve open?

A

Less than 1 diff

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16
Q

16) What causes the Pack Flow Control valve to automatically close?

A
  • Low bleed pressure
  • Compressor outlet overheat
  • Associated FIRE pub pressed
  • DITCHING pb selected ON
  • Engine start sequence
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17
Q

17) What does an amber FAULT light in the HOT AIR pushbutton indicate?

A

Duct overheat (valve and trim air valves close automatically)

18
Q

18) How many Air Conditioning System Controllers are there?

A

Two

19
Q

19) Describe how the Air Conditioning System Controllers regulate temperature?

A

Modulating the bypass valve and ram air inlet of its associated pack

20
Q

20) What occurs when an active lane of an Air Conditioning System Controller fails?

A

No effect. The second takes over.

21
Q

21) What occurs when both lanes of an Air Conditioning System Controller fail?

A

Related pack is lost

Hot air and pressure regulating valve and trim air valve closes

22
Q

22) How does the Air Conditioning System Controller configure its associated pack ram air inlet flap for takeoff and landing to avoid the ingestion of foreign matter?

A

Closes

23
Q

23) If an air cycle machine (ACM) fails, what occurs?

A

Affected pack may be operated in heat exchanger cooling mode

24
Q

24) What effect will the engine start sequence have on the pack flow control valves?

A

Closes and doesn’t open for 60 secs to allow for start of other engine

25
Q

25) What logic controls the X-Bleed valve when the X-BLEED switch is in AUTO?

A

Valve will open and close automatically when:

  • APU bleed valve open, X Bleed opens
  • APU bleed valve closes, X Bleed closes
  • System detects a leak, X Bleed closes
26
Q

26) After engine start with the APU BLEED pushbutton ON, what source is supplying bleed air to the packs?

A

APU

27
Q

27) The pneumatic system is monitored and controlled by what?

A

Two Bleed Monitoring Computers (BMC1 & BMC2)

28
Q

28) If one BMC fails, can the other take over?

A

Yes

29
Q

29) What does the amber FAULT light in the APU BLEED pushbutton indicate?

A

Leak

30
Q

30) What causes the amber FAULT light on the ENG 1 BLEED and/or ENG 2 BLEED pushbutton (OOLD)?

A
  • Overpressure
  • Overheat
  • Leak (wing or pylon)
  • Valve not closed during start or when APU bleed on
31
Q

31) What are the two functions of the engine bleed valves?

A
  • Shut off

- Pressure regulating

32
Q

32) When does the Lav/Galley Extract Fan operate?

A

Continually (when electric power available)

33
Q

33) What is the purpose of the CAB FANS?

A

Recirculate and combine cold fresh air from packs and cabin air

34
Q

34) With BLOWER and EXTRACT pushbuttons in AUTO how does the system operate?

A 
Ground
- Open, skin temp 9 degrees or higher
- Closed, skin temp 12 C or lower
In Flight
- Intermediate, skin temp 32 C or higher
- Closed, skin temp. 35 C or lower
35
Q

35) With both BLOWER and EXTRACT pushbuttons in OVRD (smoke configuration) what are the positions of the INLET and OUTLET (EXTRACT) valves?

A

Inlet closes & outlet/extract opens

36
Q

36) What is the status of the Blower and Extract fans with the Blower and Extract pushbuttons in OVRD?

A

Blower fan stops & extract fan continues to run

37
Q

37) When is air conditioning introduced into the avionics compartment?

A

In smoke configuration (closed configuration)

38
Q

38) Is the skin heat exchanger valve ever closed in flight?

A

Yes, closed configuration

39
Q

39) What does an amber FAULT light on the BLOWER pushbutton indicate?

A
  • Pressure is low
  • Duct overheats
  • Computer power supply fails
  • Smoke warning activated
40
Q

40) What does an amber FAULT light on the EXTRACT pushbutton indicate?

A
  • Pressure low
  • Computer power supply fails
  • Smoke warning activated
41
Q

41) With 2 FAULT lights on the VENTILATION panel are there any other indications?

A

SMOKE on EMER ELEC PWR - GEN 1 pb

42
Q

42) What does the CARGO HEAT HOT AIR amber FAULT light indicate?

A

Duct overheat

Airbus Alaska (18 decks)

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