787 winter ops

Anytime the outside air temperature is less than 10°c to verify that there is no contamination adhering to the wings.

3deg or lower in visible moisture of less than 1sm, or when engine anti ice is required. 

40%N1, 5sec, max 60min intervals.

• 4 in (102mm) of light dry snow or
• 2 in (51mm) of packed dry snow or
• 1/2 in (12.7mm) of slush, wet snow or standing water

• wet ice
• water over ice
• water over compacted snow
• slush over ice
• dry snow or we snow over ice