737 MAX Flight Crew Operations Manual
Supplementary Procedures
Chapter SP
Adverse Weather
Section 16
MN-FLT-OH-201
SP.16.1
16 Adverse Weather
Adverse Weather
File Highlight
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).
Cold Weather Operations
Considerations associated with cold weather operation are primarily
concerned with low temperatures and with ice, snow, slush and standing
water on the airplane, ramps, taxiways, and runways.
March 1, 2021
