DE-ICING

Question 1

On the ground, when MUST ENG anti-ice be selected ON?

Answer 1

OAT < 10*C and visible moisture present decreasing visibility to 1 Nm (1600m) or less

Question 2

What does LOUT stand for with regards to de-icing fluids?

Answer 2

Lowest Operational Use Temperature

Question 3

If you expect to need a long HOT in icing conditions on the ground prior departure, what is the recommended de-icing procedure?

Answer 3

2 step de-icing/anti-icing

Question 4

When should ANTI-ICING be applied?

Answer 4

Any form of freezing precipitation (either falling or expected prior departure)

Question 5

What is CM1’s good practice to perform prior de-icing with regards to the passengers?

Answer 5

Make a PA and explain the procedure to comfort them

Question 6

What de-icing/anti-icing fluids are allowed to be used?

Answer 6

• Heated water (de-icing only as part of 2 step procedure)
• Type I
• Mixture of Type I and water
• Type II
• Type IV
• Mixture of Type II and water
• Mixture of Type IV and water

Question 7

Must de-icing fluids always be heated?

Must anti-icing fluids always be heated?

Answer 7

• YES

- NO (may be applied cold on clean wing surfaces)

Question 8

What is a Pre-Take Off Contamination Check (WING CHECK)

Answer 8

If the HOT has been exceeded the flight crew may do a WING CHECK from the cabin to check if the fluid is still effective (glossy, smooth and wet)

If negative (precipitation adhering to the A/C or fluid has become in-effective (murky)) take off is prohibited and de-icing and anti-icing must be done again