Wing and Engine Anti-Ice Operation

Question 1

Use of wing anti-ice above FL 350 may cause

Answer 1

bleed trip off and possible loss of cabin pressure

Question 2

Wing anti-ice must be off for

Answer 2

bleeds off takeoff and landings

Question 3

The primary method to use the wing anti-ice in flight is

Answer 3

By allowing ice to accumulate before turning wing anti-ice on.

Question 4

Why wait until ice has formed to turn on wing anti-ice?

Answer 4

Provides the cleanest airfoil surface, Least possibility of runback ice formation, least thrust and fuel penalty

Question 5

Operate the wing anti-ice system as an anti-icer only during:

Answer 5

Extended operations in moderate or sever icing conditions, such as holding.

Question 6

Ice accumulation on the flight deck window frames, windshield center post, or on the windshield wiper arm may be used as…

Answer 6

an indication of structural icing conditions and the need to turn on wing anti-ice

Question 7

Engine anti-ice must be ON prior to, and during all flight operations when icing conditions exist or are anticipated, except

Answer 7

during climb and cruise when temperature is below -40°C SAT

Question 8

Engine anti-ice must be ON prior to, and during

Answer 8

descent in all icing conditions, INCLUDING temperatures below -40°C SAT

Question 9

What must be observed after positioning engine anti-ice switches to on?

Answer 9

(NG) Observe that each COWL VALVE OPEN light illuminates bright, then dim, and COWL ANTI-ICE lights are extinguished.
(MAX) Verify that the COWL ANTI-ICE lights are extinguished.

Question 10

In flight in moderate to sever icing conditions that cannot be avoided, accomplish engine run up one engine at a time to…

Answer 10

a minimum of 80% N1 at approximately 15-minute intervals to clear ice from fan blades and spinner
If vibration is 4.0 units or greater after run up is completed, accomplish the Engine High Vibration non-normal checklist.