General OPS: Cold Weather

Question 1

What are the conditions conducive to icing on the ground?

Answer 1

-OAT is <10 C 
and
-Visible moisture 
or
-Operating on contaminated ramps/taxiways/runways

Question 2

What are the conditions conducive to icing in flight?

Answer 2

-TAT indicates <10 C
and
-Visible moisture is encountered

Question 3

In flight, at what temperature do icing conditions no longer exist?

Answer 3

In Flight SAT (static air temp) is equal to or

Question 4

Takeoff is prohibited when which types of contaminates are adhering to the critical surfaces?

Answer 4

• Frost
• Snow
• Slush

Question 5

When is cowl anti-ice required in flight? Wing anti-ice?

Answer 5

Cowl:
-Flying in icing conditions
or
-ICE annunciation by the ice detection system
Wing:
-ICE annunciation by the ice detection system
or
-Flying in icing conditions and airspeed is less than 230 KIAS
or
-In Icing conditions during descent from cruise altitude
or
-Prior to extending flaps for all approaches when TAT is 10C or colder

Question 6

During climb (High Pwr Settings), when wing and cowl or cowl anti-ice is required, what is the procedure for selecting anti-ice?

Answer 6

-Wing anti-ice on PRIOR to Cowl anti-ice

Prevents over pressure relief valve from opening

Question 7

What are important warnings and note for flight in Icing conditions?

Answer 7

• Even small amounts of ice on leading edge and change stall speed, characteristics or warning margin by Stall Protection System
• Do NOT land below Vref or land with VISIBLE ice on the wing leading edge, except under failure conditions