COLD WX OPS

Question 1

WHY IS IMPORTANT THE DE-ICING OR ANTI-ICING?

Answer 1

Any deposit of ice, snow or frost on the external surfaces of an aeroplane may drastically affect its performance due to reduced aerodynamic lift, increased drag, modified stability and control characteristics

moving parts, such as elevators, ailerons, flap actuating mechanism etc., to jam and create potentially hazardous condition

Question 2

WHEN IS FORMING ACTIVE FROST?

Answer 2

Active frost occurs when aeroplane surface temperature is at or below 0 °C (32 °F) when the humidity of the air is at or below dew point.

Question 3

WHICH ARE THE TYPES OF FLUID APPLIED?

Answer 3

Anti-Icing Fluid: Mixture of water & Type I fluid; Premix Type I fluid; Type II fluid, Type III fluid, or Type IV fluid; Mixture of water and Type II fluid, Type III fluid or Type IV fluid.

Question 4

CLEAR ICE DEFINITION?

Answer 4

A coating of ice, generally clear and smooth, but with some air pockets

Question 5

COLD-SOAKED EFFECT

Answer 5

The wings of an aeroplane are said to be “cold soaked” when they contain very cold fuel as a result of having just landed after a flight at high altitude or having been refueled with very cold fuel

Whenever precipitation falls on a cold soaked aeroplane on the ground, clear icing may occur.