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United 737 > Anti-Ice & Rain > Flashcards

Flashcards in Anti-Ice & Rain Deck (35)
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1
Q

Which areas on the plane are protected with thermal and electrical anti-icing?

A

Engine anti-ice, wing anti-ice, flt deck window heat, probe and sensor heat and windshield wipers.

2
Q

Which window does the windshield air control provide adjustments to?

A

1 window for both CA & FO

3
Q

What are the windshield wiper positions?

A

Park, INT, LOW, HIGH

4
Q

What does placing the engine anti-ice switch on do in addition to opening the valve?

A

sets stick shaker logic. This involves changing the speed indicator stick shaker and min maneuver speed bars. Wing anti-ice on also adds corrections.

5
Q

Engine anti-ice valves are controlled_______ and activated by ________ pressure

A

electrically, bleed air

6
Q

Valves for WIng Anti-ice are operated by _____ motors.

A

AC

7
Q

Wing anti-ice can only be used in the air

A

False. placing the switch ON causes the valves to open or close depending on the engine thrust setting or duct temp.

8
Q

Which slats does the wing bleed anti-ice air go to?

A

three inboard leading edge slats on each wing.

9
Q

Which slats have no protection for wing icing?

A

leading edge flap and outermost slat.

10
Q

T/F: Windows 1 and 2 on both sides have a conductive coating on the outer layer of glass that prevents fogging and ice accumulation.

A

True.

11
Q

What happens if a window heat is experienced?

A

power is automatically removed. An amber OVERHEAT light comes on.

12
Q

How many minutes before takeoff should the window heat be placed on?

A

10 minutes. Also, ensure OVERHEAT lights are out.

13
Q

What does the WINDOW HEAT OVHT TEST switch do?

A

Simulates an overheat condition. All lights should be on.

14
Q

What can an OVERHEAT light on the window heat panel also mean?

A

electrical power to one or more windows is interrupted.

15
Q

When do window heat ON lights extinguish?

A

Switch is OFF
an overheat is detected
System failure has occured
System is at correct temp.

16
Q

Which windows are provided with conditioned air for de-fogging?

A

1 windows.

17
Q

T/F: You may operate the windshield wipers on a dry window.

A

False.

18
Q

Which probes are heated? Which are not?

A

Heated: pilot probes, TAT probe and Alpha vanes are electrically heated.
Not heated: static ports.

19
Q

With respect to probe heating, what happens when on standby power?

A

No indication of system status
Stby airspeed probe not heated
Captain’s probe only one heated
-no indication of failure.

20
Q

When will you see the blue COWL VALVE OPEN light?

A

Only when the valve is in transit. Goes off when it reaches the commanded position.

21
Q

T/F: You can use engine anti-ice when OAT on ground or TAT in flight is 10C or above.

A

False.

22
Q

What is the first thing you do when turning on the engine anti-ice?

A

1st: Turn both ENGINE START switches to CONT. Then turn on anti-ice switches.

23
Q

Where will TAI appear when the engine anti-ice switches are on?

A

On the Upper Display Unit of engine info.

24
Q

Once engine anti-ice is no longer needed, where do the ENGINE START switches go?

A

AUTO setting.

25
Q

What happens when the WING ANTI-ICE switch is moved on?

A

Valves should open and L and R VALVE OPEN lights should illuminate blue to show the valve is in transit.

26
Q

What happens to the WING ANTI-ICE switch just after lift off?

A

it automatically trips OFF.

27
Q

On the ground, when is Wing Anti-Ice not required

A

When you’ve used Type II or Type IV de-icing fluid.

28
Q

What does the amber COWL ANTI-ICE mean?

A

there is an overpressure downstream of the cowl anti-ice valve. The duct pressure needs to be reduced.

29
Q

When COWL ANTI-ICE comes on, what do you do?

A

Take Autothrottles off and then retard the thrust for that engine.

30
Q

What would indicate that a cowl valve has not moved to the commanded position?

A

COWL VALVE OPEN light remains illuminated and the TAI indication on the Upper DU is still amber.

31
Q

If ENG ANTI-ICE on and a blue COWL VALVE OPEN light on, what position is the valve in?

A

It has failed in the closed position. Avoid icing conditions.

32
Q

If the ENG ANTI-ICE switch is off and the blue COWL VALVE OPEN light is on, what has happned?

A

The valve has failed in the open position. If TAT is 10C or above, thrust on the affected engine should be limited to 80% N1 if possible.

33
Q

If a window heat OVERHEAT light comes on and you have turned off the switch, how long should you wait to bring it back on?

A

2-5 minutes.

34
Q

If a window heat switch is off, limit airspeed to _____ knots max below _______ feet due to loss of strength of the window.

A

250 kts, 10,000 feet.

35
Q

If a WING ANTI-ICE valve has failed open and the TAT is above 10C or there is no visible moisture, what can you do?

A

close the wing isolation valve and turn the associated side pack OFF and the engine bleed side off on that side too.