Anti-Ice & Rain

Question 1

What does the WINDOW HEAT OVERHEAT (amber) light mean?

Answer 1

Indicates an overheat in the respective window / power will be removed from window.

Question 2

What does the COWL ANTI-ICE (amber) light mean?

Answer 2

Excessive pressure in the duct leading from the Cowl Anti-Ice Valve to the cowl lip.

Question 3

With the Engine Anti-Ice selected ON, what is the difference between a dim blue and bright blue indication?

Answer 3

Dim blue indicates the valve is open. Bright blue indicates the valve is either in transit or still closed.

Question 4

What does an amber TAI indication to the left of an N1 display on the Upper Display Unit indicate?

Answer 4

When the Cowl Anti-Ice Valve fails to move to the position selected by the ENG ANTI-ICE switch.

Question 5

Which Devices (flaps and/or slats) are heated by the Wing Anti-Ice System?

Answer 5

Three inboard leading edge slats.

Question 6

What causes the Wing Anti-Ice Control Valves to close during ground operations?

Answer 6

Thrust on both engines is above the setting for takeoff warning activation (60° thrust lever position), or the temperature inside both wing distribution ducts is greater than the thermal switch activation temperature (125°C).

Question 7

How is the stall warning logic for icing conditions affected with the WING ANTI-ICE switch?

Answer 7

Sets stall logic for icing conditions.

Question 8

The PROBE HEAT provides electrical heating for which sensors?

Answer 8

PITOT, ELEV PITOT, ALPHA VANE, and TEMP PROBE.