Cold Weather Operations

Question 1

What condition is prohibited for takeoff in cold weather?

Answer 1

Takeoff is prohibited with frost, ice, snow, or slush adhering to any critical surface (wings, horizontal stabilizer, vertical stabilizer, control surfaces, and engine inlets)

Question 2

What condition is permitted for takeoff in cold weather?

Answer 2

Takeoff is permitted with frost adhering to the underside of the wing, that is caused by cold-soaked fuel.

Question 3

What check is required in what condition during external walkaround (preflight) inspection in cold weather?

Answer 3

> Tactile check

• the OAT is 5°C or less, or
• the wing fuel temperature is 0°C or less; or
• the atmospheric conditions have been conducive to frost formation (ice and frost may continue to adhere to wing surface for some time, even at outside temperatures above 5°C)