737 Flight Crew Operations Manual
Performance Inflight
Text
737-800WSFP1/CFM56-7B26
FAA
Category C/N Brakes
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
D6-27370-866-EGP PI.17.3
Flap Maneuver Speeds
This table provides flap maneuver speeds for various flap settings. During
flap retraction, selection of the next flap position is initiated when reaching
the maneuver speed for the existing flap position. During flap retraction,
at least adequate maneuver capability or 30° of bank (15° of bank and 15°
overshoot) to stick shaker is provided at the flap retraction speed. Full
maneuver capability or at least 40° of bank (25° of bank and 15° overshoot)
is provided when the airplane has accelerated to the recommended
maneuver speed for the selected flap position.
During flap extension, selection of the flaps to the next flap position
should be made when approaching, and before decelerating below, the
maneuver speed for the existing flap position. The flap extension speed
schedule varies with airplane weight and provides full maneuver capability
or at least 40° of bank (25° of bank and 15° overshoot) to stick shaker at
all weights.
Slush/Standing Water Takeoff
Experience has shown that aircraft performance may deteriorate
significantly on runways covered with snow, slush, standing water or ice.
Therefore, reductions in field/obstacle limited takeoff weight and revised
takeoff speeds are necessary. The tables are intended for guidance in
accordance with advisory material and assume an engine failure at the
critical point during the takeoff.
The entire runway is assumed to be completely covered by a contaminant
of uniform thickness and density. Therefore this information is
conservative when operating under typical cold weather conditions where
patches of slush exist and some degree of sanding is common. Takeoffs in
slush depths greater than 13 mm (0.5 inches) are not recommended because
of possible airplane damage as a result of slush impingement on the
airplane structure. The use of assumed temperature for reduced thrust is
not allowed on contaminated runways. Interpolation for slush/standing
water depths between the values shown is permitted.
Takeoff weight determination:
1. Enter the Weight Adjustment table with the dry field/obstacle limit weight
to obtain the weight reduction for the slush/standing water depth and
airport pressure altitude.
2. Adjust field length available for temperature by amount shown beneath
V1(MCG) limit weight table.
3. Enter the V1(MCG) Limit Weight table with the adjusted field length and
pressure altitude to obtain the slush/standing water limit weight with
respect to minimum field length required for V1(MCG) speed.
September 15, 2016
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