PSA Icing Limits, Not Bolded

Question 1

Definition of Wet:

Answer 1

A runway is considered to be wet when there is sufficient moisture to cause it to appear reflective with a water depth less than 1/8 inch covering 100% of the runway surface. If there are dry spots showing on a drying runway with no standing water, the runway is not considered to be wet.

Question 2

Definition of Contaminated:

Answer 2

A runway or taxiway is considered to be contaminated when more than 25% of the runway surface area (whether in isolated areas or not) within the required length and width being used is covered by 0.125” of standing water, 0.15” of slush or wet snow, or 0.8” of dry snow or greater.

Question 3

Tactile Check required when:

Answer 3

• OAT is 5C or less, or
• Wing fuel temp is 0C or less, or
• Atmospheric conditions have been conducive to frost formation

Question 4

Cold Soak Definition:

Answer 4

First flight of the day, when the ambient temp has been -30C or below for more than 8 hours.

Question 5

Cold Soak Operational Requirements:

Answer 5

• Engine must be motored for 60 seconds and fan rotation must be verified before an engine start is initiated.
• Thrust reversers must be actuated until the deploy and stow cycles are less than:
• 200: 5 seconds.
• 700/900: 2 seconds.