Anti-Ice/Window Heat

Question 1

What happens when Anti-Ice is turned on? (3 Items)

Answer 1

PRV opens when the NAI Valve is open,
Igniters run continuously, and
NAI Valve Opens.

Question 2

On the 747-8, the ‘BLD LO TEMP’ EICAS Message indicates what?

Answer 2

Engine Bleed Air Temperature too low for sufficient wing Anti-Ice.

Question 3

Does the NAI operate in the ‘AUTO’ Position on the ground?

Answer 3

No.

Question 4

How many Ice Detection Probes are on the 747, and where are they located?

Answer 4

2. Located on each side of the FWD Fuselage.

Question 5

How many AoA probes are on the 747? When are they heated?

Answer 5

2. One on each side of the FWD Fuselage. Probes are heated when at least 1 engine on each wing is operating.

Question 6

How many Pitot Static Probes on the 747? When are they heated?

Answer 6

4. Heated when at least one Engine on each wing is operating.

Question 7

The Window Heat switches provide heating and de-fogging to which windows/windshields?

Answer 7

The two forward windshields only.

Question 8

On the 747-400, what is indicated on the Primary EICAS when Anti-Ice is operational?

Answer 8

‘NAI’ for Nacelle Anti-Ice, and
‘WAI’ for Wing Anti-Ice.

Question 9

On the 747-8, what is indicated on the primary EICAS when Anti-Ice is operational?

Answer 9

‘EAI’ for Engine Anti-Ice, and
‘WAI’ for Wing Anti-Ice.

Question 10

Is Wing Anti-Ice effective with the LE Flaps extended?

Answer 10

No.

Question 11

Is it possible to operate Wing Anti-Ice on the ground?

Answer 11

No, Wing Anti-Ice is inhibited on the ground.

Question 12

Is it possible to operate Wing Anti-Ice on the ground?

Answer 12

No, Wing Anti-Ice is inhibited on the ground.