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787 Technical Questions > 03. Anti-Ice, Rain > Flashcards

03. Anti-Ice, Rain Flashcards

1
Q

How many ice detection systems are fitted to the aircraft?

A

Two

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2
Q

When is automatic ice detection inhibited on the ground?

A

Below 75kts

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3
Q

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

A

Engine, wing and pack inlet anti-ice

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4
Q

When are the ice detectors heated?

A

They are electrically heated after engine start

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5
Q

What is the heat source for engine anti-ice?

A

Bleed air

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6
Q

Which section of the engine is de-iced?

A

Engine core & cowl inlet

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7
Q

Can engine anti-ice be used on the ground?

A

Yes, in MANUAL mode

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8
Q

What indicates that engine anti-ice is on?

A

EAI is displayed above the EICAS N1 indication

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9
Q

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

A

The engine EEC automatically adjusts idle to prevent icing

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10
Q

If there is a leak in the engine anti-ice…

a. how is it detected?
b. what is the automatic action? c. what is the indication?

A

a. Duct leak detection system.
b. Engine anti-ice valve closes
c. EICAS message ANTI-ICE LEAK ENG L, R.

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11
Q

What is the heat source for wing anti-ice?

A

Electrically powered thermal anti-icing mats

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12
Q

Which areas are anti-iced on the wing?

A

Four midwing leading edge slats on each wing

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13
Q

When is automatic wing anti-ice available?

A

In flight and on the ground above 75kts

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14
Q

What happens if a wing anti-ice thermal mat fails?

A

The system automatically de-powers the opposite thermal mat to prevent asymmetrical wing icing.

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15
Q

What is the cockpit indication when wing anti-ice is operating?

A

WAI is displayed below the EICAS N1 indication

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16
Q

With flaps out of up and engine or wing anti-ice ON, what happens to the stick shaker logic?

A

Stick shaker speed and minimum maneuvering speed is increased. This reduces maneuver margin to stick shaker.

17
Q

What provides pack ram air inlet anti-ice protection?

A

Electric heaters on the leading edge of each inlet

18
Q

When is pack inlet anti-icing inhibited?

A

On the ground and when TAT is above 10°C

19
Q

What is the indication for:

a. A failed window heater?
b. Twoormorefailedwindowheaters?

A

a. INOP light and appropriate EICAS message.

b. INOP lights and EICAS WINDOW HEAT message.

20
Q

When is window heat applied?

A

Window heat switches in the ON position, the primary system operates automatically

21
Q

Which windows have backup antifogging?

A

The forward windows.

22
Q

How is backup antifogging activated?

A

Automatically when the BACKUP L FWD and R FWD switches in the ON position.

23
Q

Which wiper selections are available?

A

OFF, INT (Intermittent), LOW and HIGH

24
Q

When is power applied to the pitot and angle of attack probes?

A

When either engine is running

25
Q

When is power applied to the TAT probe?

A

In flight

787 Technical Questions (20 decks)

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