Anti-Ice, Rain

Question 1

How many ice detection systems are fitted to the aircraft?

Answer 1

Two

Question 2

When is automatic ice detection inhibited on the ground?

Answer 2

Below 75kts

Question 3

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

Answer 3

Engine, wing and pack inlet anti-ice

Question 4

When are the ice detectors heated?

Answer 4

They are electrically heated after engine start

Question 5

What is the heat source for engine anti-ice?

Answer 5

Bleed air

Question 6

Which section of the engine is de-iced?

Answer 6

Engine core & cowl inlet

Question 7

Can engine anti-ice be used on the ground?

Answer 7

Yes, in MANUAL mode

Question 8

What indicates that engine anti-ice is on?

Answer 8

EAI is displayed above the EICAS N1 indication

Question 9

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

Answer 9

The engine EEC automatically adjusts idle to prevent icing

Question 10

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

a. how is it detected?

Answer 10

a. Duct leak detection system.

Question 11

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

b. what is the automatic action?

Answer 11

b. Engine anti-ice valve closes.

Question 12

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

c. what is the indication?

Answer 12

c. EICAS message ANTI-ICE LEAK ENG L, R.

Question 13

What is the heat source for wing anti-ice?

Answer 13

Electrically powered thermal anti-icing mats

Question 14

Which areas are anti-iced on the wing?

Answer 14

Four midwing leading edge slats on each wing

Question 15

When is automatic wing anti-ice available?

Answer 15

In flight and on the ground above 75kts

Question 16

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

Answer 16

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

Question 17

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

Answer 17

WAI is displayed below the EICAS N1 indication

Question 18

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

Answer 18

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

Question 19

What provides pack ram air inlet anti-ice protection?

Answer 19

Electric heaters on the leading edge of each inlet

Question 20

When is pack inlet anti-icing inhibited?

Answer 20

On the ground and when TAT is above 10°C

Question 21

What is the indication for:

a. A failed window heater?

Answer 21

a. INOP light and appropriate EICAS message.

Question 22

What is the indication for:

b. Two or more failed window heaters?

Answer 22

b. INOP lights and EICAS WINDOW HEAT message.

Question 23

When is window heat applied?

Answer 23

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

Question 24

Which windows have backup antifogging?

Answer 24

The forward windows.

Question 25

How is backup antifogging activated?

Answer 25

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

Question 26

Which wiper selections are available?

Answer 26

OFF, INT (Intermittent), LOW and HIGH..

Question 27

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

Answer 27

When either engine is running

Question 28

When is power applied to the TAT probe?

Answer 28

In flight