Oral Bank - ANTI-ICE / WINDOW HEAT

Question 1

Describe what happens when NAI is commanded on? (3)

Answer 1

• NAI valves open
• Selected engine igniters operate continuously
• Engine PRV opens when the NAI valve is open

Question 2

The 747-8 EICAS msg BLD LOW TEMP indicates what?

Answer 2

Engine bleed air to low for sufficient wing anti-icing

Question 3

Does the Nacelle Anti-Ice AUTO position function on the ground?

Answer 3

No, auto only works inflight

Question 4

How many ice detection probes are there, and where are they located?

Answer 4

2 probes located on the forward fuselage

Question 5

How many angle of attack probes are provided, and when are they heated?

Answer 5

2 probes electrically heated when ANY engine is operating

Question 6

How many pitot-static probes are provided, and when are they heated?

Answer 6

4 probes, electrically heated when ANY engine is operating

Question 7

Window Heat ON switches provide both anti-ice and anti-fogging protections to which flight deck windows?

Answer 7

Forward left and right windshields only

Question 8

On the -400, what indications are displayed, on primary EICAS, when the Nacelle anti-ice and/or the wing anti-ice valve is open?

Answer 8

• NAI for nacelle anti-ice
• WAI for wing anti-ice

Question 9

On the -8, what indications are displayed, on primary EICAS, when the nacelle anti-ice and/or the wing anti-ice valve is open?

Answer 9

• EAI for engine nacelle anti-ice
• WAI for wing anti-ice

Question 10

Is wing anti-ice effective with the leading edge flaps extended?

Answer 10

No

Question 11

Can you operate the wing anti-ice system on the ground?

Answer 11

No, prohibited