Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Atlas Air B747 April 2022 > Anti- Ice / Rain *** > Flashcards

Anti- Ice / Rain *** Flashcards

1
Q

What happens when you turn the nacelle anti-ice switches on?

A
  • NAI valve opens when the bleed air pressure is available.
  • Engine igniters selected by the Auto Ignition selector and EEC operate continuously.
  • PRV opens when anti-ice is ON.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What conditions would prevent the PRV from opening when nacelle anti-ice is on?

A
  • Prior or present bleed air overheat
  • Start valve not closed
  • HP bleed air valve failed open
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

With the Nacelle Anti-Ice Switches in AUTO during icing conditions inflight, when will the system operate?

A

• When nacelle icing conditions exist

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

When a Nacelle Anti-ice switch is ON, the respective nacelle anti-icing valve is:

A

• Commanded open.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

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

A

• Two probes are located on the forward fuselage left and right

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

If the engine bleed air valve is closed, and nacelle anti-ice is commanded, what is the source of bleed air for nacelle anti-ice?

A

• IP bleed only (HP bleed valve remains closed)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

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

A

• No, wing anti-ice is ineffective when the LEF are not retracted.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

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

A

• No, on the ground, the system is off and the wing anti-ice valves are closed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What part of the engine and wing are heated with NAI and WAI?

A
  • Nacelle inlets

* Wing leading edges

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is displayed on primary EICAS when the nacelle anti-ice and/or the wing anti-ice valve is open?

A

• “NAI” for nacelle anti-ice; and “WAI” for wing anti-ice.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Describe flight deck window heating systems.

A
  • Flight deck windows are electrically heated
  • Forward windshields have anti-ice protection on the exterior surfaces
  • Forward windshields have anti-fogging on the interior surfaces.
  • Side windows have controlled anti-fogging heating on the interior surfaces
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What windows’ heating system is controlled by the window heat switches?

A

• Forward windshields only

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Since the forward windshields are controlled by the window heat switches, how do we heat the side windows?

A
  • Side window heating is automatic.
  • No flight deck controls are provided
  • System is powered whenever the AC electrical system is powered.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

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

A

• 4 pitot-static probes, electrically heated when any engine is operating.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

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

A

• 2 angle of attack probes are heated when any engine is operating.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

NAI: AUTO (On Ground)

A

System OFF. When NAI valve is open following a landing, it remains on until engine shutdown.

17
Q

NAI: AUTO (In Flight)

A

NAI operates in response to ice detection.

18
Q

NAI: ON

A
  • Valve Opens
  • Ignitors operate continuously
  • PRV opens
19
Q

3 times PRV won’t open for NAI activation?

A
  • Bleed Air Overheat
  • Start Valve not closed
  • HP bleed valve failed open
20
Q

WAI: AUTO (In Flight)

A

Open valves in flight with ice detection if:

- Leading edge flaps retracted

21
Q

WAI: AUTO (On Ground)

A

Inhibited

22
Q

WAI: ON (On Ground)

A

Inhibited

23
Q

WAI: ON (In Flight)

A

Valves OPEN regardless of leading flap position but only effective if flaps are retracted.

24
Q

WAI Valve Light (Amber)

A

Either WAI valve position disagrees with switch position.

25
Q

NAI Valve Light (Amber)

A

Respective NAI valve position disagrees with switch position.

26
Q

What happens if fault or overheat of fwd/side window heat occurs?

A

Power is disconnected

INOP Light on Switch

27
Q

How do you reset system after a fault/overheat of window heat?

A

Push window heat switch to turn OFF for 10 seconds, then back ON.

28
Q

Where is windshield washer reservoir?

A

Behind door in book storage of captain side panel.

29
Q

When are anti-ice probes (AOA, Pitot/Static/TAT) heated?

A
  • When any engine is running.

- TAT on in flight.

30
Q

When is the TAT probe heated?

A

In flight only

31
Q

How do we turn on the pitot heat?

A

They are on automatically anytime any engine is operating.

32
Q

What is powered with the Window Heat switches ON? What is de-powered with the switched OFF?

A

ON: Controlled Heat is applied to the windshield.

*Only the front two windows are heated for anti-ice (exterior) and anti-fog (interior). 1L an 1R

Side windows are constantly heated and has anti-fog (interior).

Heat to side windows is automatic whenever AC power is on the airplane. Side window heat has no cockpit control.

OFF: Off for 10 seconds resets a heat controller fault

33
Q

What does the INOP light in the Window Heat switch mean?

A

The switch is off, or
An overheat has occurred, or
A system fault has occurred.

34
Q

What do the Washer switches do in the ON position?

A

Washer Fluid is applied to the respective windshield. The switch is spring loaded to the neutral position.

35
Q

What do the OFF, LO, and HI positions of the Wiper switches do?

A

OFF: Off and sequence to the stowed position.
LO: Operates at low speed
HI: Operates at high speed

36
Q

What does the Wing Anti-Ice switch do when pressed IN/OUT?

A

Out=OFF: Wing Anti-Ice valve commanded closed

IN=ON: In flight WAI valve opens to supply bleed air to leading edges of wing

**On ground: system is OFF and WAI valves closed regardless of position of switch.

37
Q

What do the OFF, AUTO, and ON positions of the Nacelle Anti-Ice Switches do?

A

OFF: NAI valve commanded closed

AUTO: In flight the system operates when nacelle icing conditions exist and the ON position requirements are met.

ON:NAI valve opens when bleed pressure is available and PRV is open. . .
. . . PRV may be closed due to current or prior bleed duct overheat, starter valve not closed, or engine High Pressure bleed valve stuck open.

ON: Selected engine ignitors operate continuously

**System works on the ground or in flight in the ON position.

Atlas Air B747 April 2022 (41 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions