Cold Weather

Question 1

What frost is acceptable on the A320?

Answer 1

only 3 mm of frost on the under side of the wing tank area is acceptable

Question 2

Why wait 5 minutes after de-icing before turning on APU BLEED?

Answer 2

There is a risk of de-icing fluid ingestion by the APU air intake, resulting in specific odors, or smoke warnings

Question 3

What is the minimum speed with ice accretion? (wing anti-ice operative)

Answer 3

In CONF clean, 1, 2 or 3: VLS + 10 kt

In CONF FULL: VLS + 5 kt

Question 4

When should securing the aircraft for cold soak be considered?

Answer 4

The OAT is less than 0 °C, and

No electrical supply and no air conditioning are provided to the aircraft, and

The temperatures of aircraft components decrease below 0 °C.

Question 5

When does the HOT start?

Answer 5

One step: begins at start of treatment
Two step: begins at the start of the second step (anti-icing)

Question 6

What color does the following deicing/anti-icing fluids have:
Type I
Type II
Type III
Type IV

Answer 6

Type I: red/orange
Type II: light yellow
Type III: bright yellow
Type IV: green

(They can all also be colorless)