Anti-ice & Rain Flashcards

1
Q

How many ice detectors are there?

A

System uses 2 detectors.

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2
Q

When is power supplied to the probes?

A

When either engine is running.

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2
Q

Is the ice detection system available on the ground?

A

No, inhibited on the ground below 75kts

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3
Q

When is power supplied to the ice detectors?

A

After engine start.

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4
Q

When is window heat applied?

A

System controlled automatically when the switches are in the ON position.

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5
Q

Do all flight deck windows have exterior surface anti-icing?

A

No, forward windows have exterior surface anti-icing and interior antifogging.
Side windows have interior antifogging only.

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6
Q

Which windows have backup antifogging?

A

Forward windows only.

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7
Q

How is the CAC inlet ice protected?

A

Electric heater on the leading edge of the inlet.
Operates automatically with signals from the ice detection system.
Inhibited on the ground and when TAT is above 10°C.

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8
Q

Can the engine anti-ice system be used on the ground?

A

Yes

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9
Q

Can the wing anti-ice system be used on the ground?

A

No, inhibited on the ground below 75kts.

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10
Q

Which anti-ice systems are controlled automatically by the automatic ice detection?

A

EAI, WAI and CAC inlet.

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11
Q

What are the cockpit indication of the EAI & WAI system operating?

A

EAI indication over N1 gauge

WAI indication over the EGT gauge

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12
Q

Which slats are heated by the wing anti-ice system?

A

The 4 midwing slats.

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13
Q

What happens to the engine idle setting when engine anti-ice is selected on?

A

Idle setting is set to Icing Idle to prevent engine icing.

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15
Q

How is a leak in the EAI system detected?

A

The respective engine anti-ice valves close.

EICAS “ANTI-ICE LEAK ENG L/R”

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16
Q

When do the engine anti-ice valves close automatically?

A
  • During start
  • Bleed air overtemperature
  • Bleed air overpressure
  • Bleed air leak detected
  • Engine fire switch pulled
17
Q

How many thermal anti-icing mats are on each protected slat?

A

Three

18
Q

How is asymmetric wing icing prevented?

A

System operates mats symmetrically.

If a mat fails on one wing, power is removed from opposite side mat.

19
Q

When does the wing anti-ice system operate with the selector in the ON position?

A

In the air, any time the TAT is <25°C

20
Q

How many probes are heated?

A
  • 3 pitot probes
  • 2 AOA probes
  • 2 ice detectors
  • 2 TAT probes
21
Q

When is power supplied to the TAT probes?

A

In flight