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Frontier Study 2 > Air Conditioning Panel > Flashcards

Air Conditioning Panel Flashcards

1
Q

The pneumatic system is monitored and controlled by?

A

2 Bleed Monitoring Computers (BMC)

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2
Q

If one BMC fails, can the other take over?

A

Yes, they are interconnected. If BMC 1 fails:
APU and ENG 1 leak detection are not monitored
ECAM APU BLEED LEAK warning is lost

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3
Q

The PACK FLOW selector has LO, NORM and HI positions (A320). What does this allow us to do?

A

Select pack flow rates representing LO 80%, NORM 100%, and HIGH 120% of NORM

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4
Q

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

A

Hi

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5
Q

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

A

Minimum idle 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 pushbutton (OOD)?

A

Overheat - Pack outlet
Overheat - Compressor outlet
Disagreement - 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 pushbutton indicate?

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 pushbutton?

A

LOOSA - HSBDF
L eak (wing or engine)
O ver pressure downstream
O ver heat
S tart in progress
A pu bleed ON

NEO
H igh pressure valve failed open
S ingle BTS failure on ground
B TS disagree on ground
D ual BTS failure inflight/on ground
F an duct burst detected by FADEC

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9
Q

What are the two functions of the engine bleed valves?

A

To act as:
Pressure regulation
Shut off valves

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10
Q

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

A

Differential pressure less than 1 PSI

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11
Q

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

A

When APU bleed valve is OPEN, the X-Bleed valve is open
When APU bleed valve is CLOSED, the X-Bleed valve is closed
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?

A

Upstream pressure below minimum
Pack overheat
Engine start sequence
Engine FIRE pushbutton on the related side pressed
DITCHING pushbutton is selected

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13
Q

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

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?

A
  1. 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?

A

Basic temperature regulation: Both packs produce the required outlet temperature determined by the lowest demanded zone temperature
Optimized temperature regulation: Hot air is added to the individual zones but 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?

A

The second lane takes over

17
Q

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

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?

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 is greater than or equal to 70 knots
Opens 20 seconds after speed is less than 70 knots

19
Q

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

A

The affected pack will operated as a heat exchanger

20
Q

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

A

The pack flow control valve will close automatically

21
Q

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

A

APU Bleed

22
Q

When does the LAV/Galley Extract Fan operate?

A

Continuously when electrical power is available

Frontier Study 2 (52 decks)

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