Ice/Rain Protection

Question 1

Which areas of the wings and engines are provided ice protection

Answer 1

wings: outboard 3 slats (Slats 3, 4, and 5).
engines: engine nacelle leading edge

Question 2

Recall whether an engine’s bleed valve must be open to use its engine anti-ice system.

Answer 2

No.

Engine anti-ice is plumbed independently from the high-pressure compressor therefore, the engine’s bleed valve does not have to be open to use engine anti-ice.

Question 3

Indications when engine anti-ice is selected on.

Answer 3

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

Question 4

Describe the indications of wing anti-ice being selected on:

Answer 4

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

(Green arrows appear on each side of the BLEED page when the respective wing anti-ice valve is open for that wing)

Question 5

Recall the meaning of the FAULT (amber) light in the WING and ENG 1(2) ANTI ICE pbs:

Answer 5

▪ Appears momentarily during valve transition.
▪ Represents disagreement between the selected position and actual respective valve’s position.
▪ The FAULT light on the WING pb also indicates low bleed air pressure is being detected.

Question 6

Recall the operation of the Probe and Window heating system with the PROBE/WINDOW HEAT pb in AUTO (light out).

Answer 6

▪ On the ground, with at least one engine running:
o All flight deck windows/windshields, pitot probes, static ports, and AOA probes are automatically heated at a low heat level.
▪ Once airborne, heat levels are increased, and the TAT probes are heated.

Question 7

Recall the operation of the Probe and Window heating system with the PROBE/WINDOW HEAT pb selected ON.

Answer 7

▪ On the ground, with engines not running:
o All flight deck windows/windshields, pitot probes, static ports, and AOA probes are heated at a low heat level.