737 Flight Crew Operations Manual
Supplementary Procedures -
Anti–Ice, Rain
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SP.3.2 D6-27370-866-EGP
If there is frost or ice on the lower surface outboard of measuring stick
4, there may also be frost or ice on the upper surface. The distance that
the frost extends outboard of measuring stick 4 can be used as an
indication of the extent of the frost on the upper surface.
Takeoff with CSFF on lower wing surfaces is allowable provided all
of the following condition are met::
• Ambient air temperature is at or above +4°C, +39°F
• There is no precipitation or visible moisture (rain, snow, drizzle,
or fog with less than 1 mile visibility)
• Tank fuel temperature is at or above -16°C, or +3°F
• All leading edge devices, all control surfaces, tab surfaces,
winglet surfaces, and control surface balance panel cavities
must be free of snow, ice and frost.
If all of the above conditions are not met, takeoff with light coatings
of frost, up to 1/8 inch (3 mm) in thickness, on lower wing surfaces
due to cold fuel is allowable; however, all leading edge devices, all
control surfaces, tab surfaces, winglet surfaces and control surface
balance panel cavities must be free of snow, ice and frost. If the frost
on the lower surface is greater than 1/8 inch (3 mm) in thickness, all
snow, ice and frost on the wings must be removed using appropriate
deicing/anti-icing procedures.
Takeoff with CSFF on upper wing surfaces is allowed provided all of
the following conditions are met:
• The CSFF on the wing tank upper surfaces is only within the
lines defining the permissible CSFF area with no ice or frost on
the leading edges or control surfaces
• Ambient air temperature is at or above +4°C, +39°F
• There is no precipitation or visible moisture (rain, snow, drizzle,
or fog with less than 1 mile visibility)
• Tank fuel temperature is at or above -16°C, +3°F.
If all of the above conditions are not met, all snow, ice and frost on the
wings must be removed using appropriate deicing/anti-icing
procedures.
Exterior Safety Inspection - Airplanes without Defined
Cold-Soaked Fuel Frost Area
Surfaces ..........................................................................................Check
Visually inspect the lower and upper wing surfaces.
September 24, 2015
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