Ice and Rain

Question 1

Which areas of the wings and engines are provided ice protection

Answer 1

1) Wings- outboard 3 slats (3,4,5)
2) Engines - engine nacelle leading edge

Question 2

Does an engine’s bleed valve need to be open to use its engine anti-ice system

Answer 2

No - it is plumbed independently from the HP compressor so the EBV does not have to be open use engine anti ice

Question 3

What are the indications when engine anti-ice is selected on

Answer 3

1) ON (blue) - on the respective ENG 1(2) pb
2) ENG A.ICE and IGNITION (green) - on the E/WD memo section

Question 4

What are the indications of wing anti-ice being selected on

Answer 4

1) ON (blue) - illuminates the WING pb
2) WING A. ICE (green) - appears on the E/WD memo section
3) ANTI ICE (white) - appears on each side of the BLEED page

Question 5

When does the FAULT (amber) light in the WING and ENG 1(2) ANTI ICE pbs appear and what does it indicate?

Answer 5

1) Appears momentarily during valve transition.
2) Represents disagreement between the selected position and actual valve position
3) On the WING pb also indicates low bleed air pressure is being detected.

Question 6

How will the PROBE WINDOW HEAT pb operate in the AUTO (light out) mode on the ground and in the air

Answer 6

1) On the ground with at least one engine running all flight deck windows/ windshields, pitot and AOA probes and static ports are automatically heated at a low heat level

-TAT probes are not heated on the ground

2) In the Air - heat levels are increased and the TAT probes are heated.

Question 7

How will the PROBE WINDOW HEAT pb operate when selected to ON mode on the ground with engines not running

Answer 7

All flight deck windows/ windshields, pitot and AOA probes and static ports are automatically heated at a low heat level

-TAT probes are not heated on the ground