Anti Ice, Rain

Question 1

Conditions for COWL ANTI–ICE Lights.

Answer 1

Illuminated (amber) – indicates an overpressure condition in duct downstream of engine cowl anti–ice valve.
(FCOM 3.10.5)

Question 2

Conditions for Probe Heat Lights.

Answer 2

Illuminated (amber) – related probe not heated.

FCOM 3.10.4

Question 3

When turning on ENGINE ANTI–ICE Switches - what happens?

Answer 3

1. Related engine anti–ice valve is open;
2. Stick shaker logic is set for icing conditions.
   (FCOM 3.10.5)

Question 4

What happens when placing the WING ANTI–ICE Switch to ON during flight?

Answer 4

1. Wing anti–ice control valves are open;
2. Stick shaker logic is set for icing conditions.

Note: Stick shaker logic remains set for icing conditions for the remainder of the flight, regardless of subsequent WING ANTI–ICE switch position.

Question 5

The FWD WINDOW HEAT switches control heat to which window(s)?

Answer 5

Only to window No. 1.

FCOM 3.20.3

Question 6

The wing anti–ice system provides protection to which control surfaces?

Answer 6

The wing anti–ice system provides protection for the three inboard leading edge slats by using bleed air. The wing anti–ice system does not include the leading edge flaps or the outboard leading edge slats.
(FCOM 3.20.10)

Question 7

What is the difference in wing anti ice logic on the ground and during the flight?

Answer 7

On the ground: Both valves close if either engine thrust is above the takeoff warning setting or either temperature sensor senses a duct overtemperature.
Duct temperature and thrust setting logic are disabled and have no affect on control valve operation in flight.
(FCOM 3.20.11)