787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Supplementary Procedures Chapter SP
Adverse Weather Section 16
Copyright © The Boeing Company. See title page for details.
D615Z003-TBC SP.16.1
SP.16 Supplementary Procedures-Adverse Weather
Supplementary Procedures
SP.16 Adverse WeatherAdverse Weather
Introduction
Airplane operation in adverse weather conditions may require additional
considerations due to the effects of extreme temperatures, precipitation,
turbulence, and windshear. Procedures in this section supplement normal
procedures and should be observed when applicable.
Takeoff - Wet or Contaminated Runway Conditions
The following information applies to takeoffs on wet or contaminated
runways:
• For wet runways, reduced thrust (fixed derate, assumed
temperature method, or both) is allowed provided suitable takeoff
performance accountability is made for the increased stopping
distance on a wet surface
• For runways contaminated by slush, snow, standing water, or ice,
reduced thrust (fixed derate) is allowed provided takeoff
performance accounts for the runway surface condition. Reduced
thrust using assumed temperature method, whether alone or in
combination with a fixed derate, is not allowed
• V1 may be reduced to minimum V1 to provide increased stopping
margin provided the field length required for a continued takeoff
from the minimum V1 and obstacle clearance meet the regulatory
requirements. The determination of such minimum V1 may require
a real-time performance calculation tool or other performance
information supplied by dispatch
• Takeoffs are not recommended when slush, wet snow, or standing
water depth is more than 1/2 inch (13 mm) or dry snow depth is
more than 4 inches (102 mm)
August 14, 2009
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