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VX Oral Study Guide > Air Conditioning Panel - Rev 04 > Flashcards

Air Conditioning Panel - Rev 04 Flashcards

1
Q

The pneumatic system is monitored and controlled by…?

(FCOM-DSC-36-10-10)

A

2 Bleed Monitoring Computers (BMC)

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2
Q

If one BMC fails, can the other take over?

(FCOM-DSC-36-10-20)

A

a. Yes, they are interconnected. If BMC 1 fails:

b. APU and ENG 1 leak detection are not monitored

c. ECAM APU BLEED LEAK warning is lost

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3
Q

What pack flow rate is automatically selected when APU bleed air is in use or during single pack operation?

(FCOM-DSC-21-10-50)

A

HI

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4
Q

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

(FCOM-PRO-NOR-SOP-06)

A

a. Select LO: A319/A320 less than 115 and A321 less than 140 customers

b. Select HI: Hot and humid conditions

c. During Smoke/Fumes removal, select HI as per the procedure

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5
Q

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

(FCOM-DSC-21-20-30)

A

Engine speed is automatically increased to provide adequate bleed air pressure

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6
Q

What would cause an amber FAULT light to illuminate in the PACK 1 and/or Pack 2 push button?

(FCOM-DSC-21-10-50)

A

OOD

Overheat - Pack outlet

Overheat - Compressor outlet

Discontinuity - Switch position disagreement with pack flow control valve

Note: FAULT light will be illuminated when no bleed air is supplied.

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7
Q

What does the amber FAULT light in the APU BLEED push button indicate?

(FCOM-DSC-36-20)

A

Bleed leak

(APU bleed valve closes)

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8
Q

What causes the amber FAULT light on the ENG 1 BLEED and/or ENG 2 BLEED push button?

(FCOMDSC-36-20)

A

OOLDE

Overpressure - Downstream of the bleed valve

Overheat

Leak - Low pressure

Discontinuity - APU bleed valve open and engine bleed valve not closed or

Engine Start with bleed valve not closed

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9
Q

What are the two functions of the engine bleed valves?

(FCOM-DSC-36-10-20)

A

a. Pressure regulation

b. Shut off valves

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10
Q

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

(FCOM-DSC-21-10-20)

A

1 PSI ΔP or less

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11
Q

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

(FCOM-DSC-36-10-40)

A

a. When APU bleed valve is OPEN, the X-Bleed valve is open

b. When APU bleed valve is CLOSED, the X-Bleed valve is closed

c. X-Bleed also CLOSES for wing, pylon, or APU duct leak (except during engine start)

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12
Q

What causes the Pack Flow Control valve to automatically close?

(FCOM-DSC-21-10-50)

A

UPEED

Upstream pressure below minimum

Pack overheat

Engine start sequence

Engine FIRE push button on the related side pressed

DITCHING push button is selected

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13
Q

What does an amber FAULT light in the HOT AIR push button indicate?

(FCOM-DSC-21-10-50)

A

Duct overheat - the Hot Air and Trim Air valves close automatically

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14
Q

How many Air Conditioning System Controllers are there?

(FCOM-DSC-21-10-10)

A

2 - Each Air Conditioning System Controller has 2 lanes -(Active/Standby)

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15
Q

Describe how the Air Conditioning System Controllers regulate temperature?

(FCOM-DSC-21-10-30)

A

a. Basic temperature regulation: Both packs produce the required outlet temperature determined by the lowest demanded zone temperature.

b. Optimized temperature regulation: Hot air is added to the individual zones by the trim air valves to maintain the desired zone temperatures.

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16
Q

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

(FCOM-DSC-21-10-40)

A

The second lane takes over

17
Q

What occurs when both lanes of an Air Conditioning System Controller fails?

(FCOM-DSC-21-10-40)

A

The related pack is lost. The hot air pressure regulating valve and associated trim air valve(s) close.

18
Q

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?

(FCOM-DSC-21-10-30)

A

Takeoff: Pack Ram Air Inlet Flap closes when takeoff power is set and the main landing gear struts are compressed. Reopens after main landing gear strut extension.

Landing: Pack Ram Air Inlet Flap closes as soon as the main landing gear struts are compressed and speed ≥ 70 knots. Opens 20 seconds after speed < 70 knots.

19
Q

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

(FCOM-DSC-21-20-40)

A

The affected pack will operate as a heat exchanger

20
Q

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

(FCOM-DSC-21-10-20)

A

The pack flow control valve will close automatically

21
Q

After engine start with the APU BLEED push button ON, what source is supplying bleed air to the packs?

(FCOM-DSC-36-10-20)

22
Q

When does the Lav/Galley Extract Fan operate?

(FCOM-DSC-21-30-50)

A

Continuously when electrical power is available

VX Oral Study Guide (36 decks)

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