ANTI ICE Panel (Rev. 3)

Question 1

What is accomplished if the WING anti ice pb is selected ON while the A/C is on the ground?

Answer 1

The system will self-test for 30 seconds, and then the valves will close until the A/C is airborne

Question 2

What does the WING FAULT light illumination on the ANTI ICE panel indicate?

Answer 2

• Valve disagreement (shown momentarily when valve is in transit)
• Low pressure

Question 3

What does the ENG 1(2) FAULT light illumination on the ANTI ICE panel indicate?

Answer 3

Valve disagreement (comes on momentarily when the valve is in transit)

Question 4

The pilot selects the probe/window heat pb ON on the ground to remove ice or fog on the window. Would the pilot need to select it OFF before T/O?

Answer 4

Yes, so that it can operate in the automatic mode

Question 5

What part of the wing is heated?

Answer 5

Outboard 3 slats

Question 6

In what position do the WING and ENGINE anti ice valves fail if electrical power is lost?

Answer 6

• Wing valves CLOSE

- Engine valves OPEN

Question 7

What is the significance of high swept wings versus less swept wings in ice accumulation?

Answer 7

The more swept the wing, the less time for the moisture to attach

Question 8

A flight crew is arriving to the A/C in DTW early in the morning and notice that cockpit windows are frosted over. What should the flight crew do?

Answer 8

Select the PROBE/WINDOW HEAT ON. This must be selected off prior to T/O in order to regain normal system logic

Question 9

The temperature outside is 2°C with visible moisture. What should the flight crew turn on?

Answer 9

ENG anti ice after engine start

Question 10

After T/O, when should the flight crew turn on the WING anti ice?

Answer 10

WING anti ice can be used after the aircraft is in a clean wing and when conditions warrant its use

Question 11

Climbing through FL240 in visible moisture, the crew notices the TAT is -22°C and the SAT is -45°C. What would be the appropriate use of the ENG anti ice?

Answer 11

Engine anti ice may be turned OFF in this case. Engine anti ice is required when icing conditions exist or are expected during climb or cruise when the SAT is below -40°C

Question 12

Starting a descent out of FL350 with visible moisture, the TAT is -32°C and SAT is -53°C, what would be appropriate use of the ENG anti ice?

Answer 12

Engine anti ice must be ON during the descent in icing conditions even if SAT is below -40°C

Question 13

Descending through 10,000ft, the pilots notice ice accumulation on the windshield wipers. What should they do?

Answer 13

Turn the WING anti ice on. WING anti ice may either be used to prevent or remove ice accumulation from the wing leading edges. After T/O WING anti ice can be used after the A/C is in a clean wing configuration. Ice accumulation can be detected by observing the ice indicator located between the two cockpit windshields or by observing the windshield wiper blades.

Question 14

Can the WING anti ice be used during approach and landing?

Answer 14

Yes, but it should only be considered in severe icing because second segment climb performance could be affected if a go-around is performed

Question 15

What is TAT?

Answer 15

Total air temperature, also called indicated air temperature or ram air temperature

Question 16

What is SAT?

Answer 16

Static air temperature, also called outside air temperature or true air temperature

Question 17

Should a flight crew use TAT or SAT when determining whether to turn anti ice systems on?

Answer 17

• TAT indicates when to turn anti ice ON

- SAT indicates when it may be turned OFF