Anti-Ice/Window Heat

Question 1

Describe what happens when nacelle anti ice is commanded on?

Answer 1

1)NAI valve opens

2)Selected engine igniters operate continuously

3)Engine PRV opens when NAI valve is open

Question 2

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

Answer 2

Engine bleed air too low for wing anti-icing

Question 3

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

Answer 3

No, only in flight

Question 4

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

Answer 4

Two probes are located on the forward fuselage

Question 5

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

Answer 5

-2 angle of attack 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 pitot-static probes
-Electrically heated when any engine is operating

Question 7

Window heat ON switches provide both anti-icing and anti-fogging protection to which flight deck windows?

Answer 7

Forward left and right windshields only

Question 8

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

Answer 8

-“NAI” for NAI
-“WAI” for WAI

Question 9

On the -8, what indications are displaye don primary EICAS when the NAI and/or WAI valve is open?

Answer 9

EAI - Engine Nacelle Anti-Ice
WAI - Wing Anti-Ice

Question 10

Is wing anti-ice effective with leading flaps extended?

Answer 10

No, ineffective when LEF are extended

Question 11

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

Answer 11

No, inhibited on the ground