Anti-Ice & Rain

Question 1

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

Answer 1

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

Question 2

Which window does the windshield air control provide adjustments to?

Answer 2

1 window for both CA & FO

Question 3

What are the windshield wiper positions?

Answer 3

Park, INT, LOW, HIGH

Question 4

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

Answer 4

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

Question 5

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

Answer 5

electrically, bleed air

Question 6

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

Answer 6

AC

Question 7

Wing anti-ice can only be used in the air

Answer 7

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

Question 8

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

Answer 8

three inboard leading edge slats on each wing.

Question 9

Which slats have no protection for wing icing?

Answer 9

leading edge flap and outermost slat.

Question 10

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.

Answer 10

True.

Question 11

What happens if a window heat is experienced?

Answer 11

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

Question 12

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

Answer 12

10 minutes. Also, ensure OVERHEAT lights are out.

Question 13

What does the WINDOW HEAT OVHT TEST switch do?

Answer 13

Simulates an overheat condition. All lights should be on.

Question 14

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

Answer 14

electrical power to one or more windows is interrupted.

Question 15

When do window heat ON lights extinguish?

Answer 15

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

Question 16

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

Answer 16

1 windows.

Question 17

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

Answer 17

False.

Question 18

Which probes are heated? Which are not?

Answer 18

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

Question 19

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

Answer 19

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

Question 20

When will you see the blue COWL VALVE OPEN light?

Answer 20

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

Question 21

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

Answer 21

False.

Question 22

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

Answer 22

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

Question 23

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

Answer 23

On the Upper Display Unit of engine info.

Question 24

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

Answer 24

AUTO setting.

Question 25

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

Answer 25

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

Question 26

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

Answer 26

it automatically trips OFF.

Question 27

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

Answer 27

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

Question 28

What does the amber COWL ANTI-ICE mean?

Answer 28

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

Question 29

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

Answer 29

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

Question 30

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

Answer 30

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

Question 31

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

Answer 31

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

Question 32

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

Answer 32

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.

Question 33

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?

Answer 33

2-5 minutes.

Question 34

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

Answer 34

250 kts, 10,000 feet.

Question 35

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?

Answer 35

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