ATA 21 Air Conditioning Flashcards

1
Q

What happens when the BLEED switches are selected to ON?

A

Pressure regulator and shutoff valves opens

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2
Q

What will happen when we operate the BLEED flow control selectro on the air condition panel?

A

PRSOV regulate the flow control valve, sets desired flow

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3
Q

What will happen when the #1 BLEED HOT caution light illuminates?

A

T > 290°C, automatic shutdown of related pressure regulator and shut off valve and high pressure valve

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4
Q

From where is the air to the air condition pack supplied?

A

Bleed Air, RESIRC and external ground source

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5
Q

What happens when the aircondition “PACK HOT” caution light illuminates?

A

T > 207°C, overheat in the ACM

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6
Q

What do we expect when we put the cabin-temp control selector to the F/A detent?

A

Difficulty to set temperature in flight compartment

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7
Q

What will happen when the CABIN DUSCT HOT caution light illuminates?

A

T > 88°C, pack temperature control valve will be driven to max cooling position. restored when T < 82°C

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8
Q

What do we obtain by operating the Resirculation Fan?

A
  • Circulation of air

- Prevents overheating when using the ground heater

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9
Q

Why should we normally not operate the aircondition system in manual mode?

A

Risk of exessive temperature or icing in the ducts

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10
Q

What outflow valve will controll the cabin pressure in auto- and semiauto mode?

A

Aft normal outflow valve(s)

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11
Q

Whart outflow valve will control the cabin pressure in manual mode?

A

Safety outflow valve on the forward pressure bulkhead

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12
Q

What will happen when we select the forward dump valve manual selector to OPEN?

A

Cabin altitude will increase to ambient pressure

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13
Q

What will happen when we select the cabin altitude mode selector to MAN?

A

Deactivates cabin altitude computer at AFT outflow valve

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14
Q

What is the Normal cabin pressure differential limit?

A

5,5 +/- 0,3 PSI

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15
Q

What is the maks scheduled cabin altitude?

A

8000 ft

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