Anti-Ice Operations

Question 1

In what order shall you select A/I systems ON during ground Ops?

Answer 1

Cowls then Wings (as it says)

Question 2

In what order shall you select A/I systems ON during In-Flight Ops?

Answer 2

Wings then Cowls (because of bleed pressure)

Question 3

When a/c is cold soaked, what is the procedure for starting?

Answer 3

Motor the engine at Maximum during the 1st start attempt.

If unsuccessful, you may need to preheat. Contact MX!

Question 4

What is COLD SOAKED?

Answer 4

A/c exposed to -10 deg C for “extended periods”

Question 5

When shall you operate COWL A/I systems?

Answer 5

ICE EICAS
-or-
Visible Moisture
-or-
Contaminated Surfaces
__________________
Ground Ops: OAT <= 10 deg C

Flight Ops < 22k: TAT <= 10 deg C to SAT -40 deg C

Flight Ops > 22k: TAT <= 10 deg C to SAT -40 deg C
-and-
ICE DET FAIL

Question 6

When shall you operate WING A/I systems?

Answer 6

ICE EICAS
-or-
Visible Moisture
-or-
Contaminated Surfaces
__________________
Ground Ops: OAT <= 5 deg C on final taxi
-or-
Just prior to TO power

Flight Ops < 22k: TAT <= 10 deg C to SAT -40 deg C
-and-
When temp is <= 10 deg C prior to extending flaps. [Can turn it off when out of icing conditions after you see the L R HEAT lights.]

Flight Ops > 22k: TAT <= 10 deg C to SAT -40 deg C
-and-
ICE DET FAIL

Question 7

How will you configure the bleeds during an A/I - ON Takeoff?

Answer 7

APU off 10th stage

Wings and Cowls off 14th stage

Question 8

Icing conditions exist on the GROUND when: (AOM 12.15.1 vs FCOM1 pg 49) ??

Answer 8

AOM:

Contaminated RWY surfaces
-or-
SAT <= 10 deg C
-or-
Vis moisture (below 400’ AGL from FCOM)

Question 9

Icing conditions exist in FLIGHT when: (AOM 12.15.1 vs FCOM1 pg 50) ??

Answer 9

AOM:

ICE EICAS
-or-
TAT <= 10 deg C
-or-
Vis moisture, except when SAT is <= -40 deg C