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AJ T8-8 > Ice and Rain Protection > Flashcards

Ice and Rain Protection Flashcards

1
Q

Ice and Protection

Which elements have an anti-ice protection ?

A

5

  1. Engines
  2. Wings
  3. Pack inlets
  4. Flight deck windows
  5. Probes
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2
Q

Ice and Rain Protection

Is automatic ice detection always functional ?

A

NO

It is inhibited on the ground below 75 kts.

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3
Q

Ice and Rain Protection

How many ice detection probes are there ?

A

2

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4
Q

Ice and Rain Protection

How are the engine cores and cowl inlets ice-protected ?

A

By using bleed air.

Not a bleed-less aircraft after all !

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5
Q

Ice and Rain Protection

Apart from bleed air, do the engines have additional ice protection ?

A

Yes, the engine EEC also automatically adjusts idle to prevent engine icing.

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6
Q

Ice and Rain Protection

When would the engines anti-ice valves automatically close ?

A
  • During START,
  • Bleed air overtemperature,
  • Bleed air overpressure,
  • Bleed air leak,
  • Engine FIRE SWITCH is pulled.
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7
Q

Ice and Rain Protection

WAI :
How are wing leading edges ice-protected ?

A

ELECTRICALLY.
Thermal anti-icing mats on 4 midwing leading edge slats.
3 thermal anti-icing mats on each slat.

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8
Q

Ice and Rain Protection

What happens if one thermal anti-icing mat fails on one side ?

A

To maintain aerodynamics stability, the wing anti-ice system would automatically de-power the opposite thermal mat.

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9
Q

Ice and Rain Protection

In-flight, can wing anti-ice be manually operated ?

A

YES

Positioning the wing anti-ice selector ON powers the system anytime TAT < 25°C

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10
Q

Ice and Rain Protection

Do all flight deck windows have anti-fogging protection ?

A

YES, all flight deck windows have interior anti-fogging protection.

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11
Q

Ice and Rain Protection

Do all flight deck windows have anti-icing protection ?

A

NO, only the L/R FWD windows have exterior anti-ice protection.

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12
Q

Ice and Rain Protection

When is the TAT probe electrically heated ?

A

When the aircraft is in flight.

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13
Q

Ice and Rain Protection

When are the pitot probes electrically heated ?

A

When either engine is operating.

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14
Q

How many ice detection systems are fitted to the aircraft?

A

Two

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15
Q

When is automatic ice detection inhibited on the ground?

A

Below 75kts

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16
Q

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

A

Engine, wing and pack inlet anti-ice

17
Q

When are the ice detectors heated?

A

They are electrically heated after engine start

18
Q

What is the heat source for engine anti-ice?

A

Bleed air

19
Q

Which section of the engine is de-iced?

A

Engine core & cowl inlet

20
Q

Can engine anti-ice be used on the ground?

A

Yes, in MANUAL mode

21
Q

What indicates that engine anti-ice is on?

A

EAI is displayed above the EICAS N1 indication

22
Q

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

A

The engine EEC automatically adjusts idle to prevent icing

23
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 closesc. EICAS message ANTI-ICE LEAK ENG L, R.

24
Q

What is the heat source for wing anti-ice?

A

Electrically powered thermal anti-icing mats

25
Q

Which areas are anti-iced on the wing?

A

Four midwing leading edge slats on each wing

26
Q

When is automatic wing anti-ice available?

A

In flight and on the ground above 75kts

27
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.

28
Q

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

A

WAI is displayed below the EICAS N1 indication

29
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.

30
Q

What provides pack ram air inlet anti-ice protection?

A

Electric heaters on the leading edge of each inlet

31
Q

When is pack inlet anti-icing inhibited?

A

On the ground and when TAT is above 10°C

32
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.

33
Q

When is window heat applied?

A

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

34
Q

Which windows have backup antifogging?

A

The forward windows.

35
Q

How is backup antifogging activated?

A

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

36
Q

Which wiper selections are available?

A

OFF, INT (Intermittent), LOW and HIGH

37
Q

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

A

When either engine is running

38
Q

When is power applied to the TAT probe?

A

In flight

AJ T8-8 (27 decks)

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