737 Flight Crew Operations Manual
Performance Inflight Chapter PI
Text Section 17
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.17.1
TextTextTe xtFile Highlight
Introduction
This chapter contains information to supplement performance data from
the Flight Management Computer (FMC). In addition, sufficient inflight
data is provided to complete a flight with the FMC inoperative. In the event
of conflict between data presented in this chapter and that contained in the
approved Airplane Flight Manual, the Flight Manual shall always take
precedence.
General
Takeoff Speeds
The speeds presented in the Takeoff Speeds table as well as FMC
computed takeoff speeds can be used for all performance conditions except
where adjustments must be made to V1 for clearway, stopway, anti-skid
inoperative, thrust reversers inoperative, improved climb, contaminated
runway situations or brake energy limits. These speeds may be used for
weights less than or equal to the performance limited weight.
The FMC will protect for minimum control speeds by increasing V1, VR
and V2 as required. However, the FMC will not compute takeoff speeds for
weights where the required speed increase exceeds the maximum certified
speed increase. This typically occurs at full rated thrust and light weights.
In this case, the message "V SPEEDS UNAVAILABLE" will appear on the
FMC scratchpad and the takeoff speed entries will be blank. Takeoff is not
permitted in this condition as certified limits have been exceeded. The
options are to select a smaller flap setting, select derate thrust and/or add
weight (fuel). Selecting derate thrust is the preferred method as this will
reduce the minimum control speeds. Note that the assumed temperature
method will not help this condition as the minimum control speeds are
determined at the actual temperature and therefore are not reduced.
Normal takeoff speeds, V1, VR, and V2 are read from either the dry or wet
table by entering with takeoff flap setting and brake release weight. Use
the tables provided to adjust takeoff speeds for altitude and actual
temperature or assumed temperature for reduced thrust takeoffs. Slope and
wind adjustments to V1 are obtained by entering the Slope and Wind V1
Adjustment table.
September 15, 2016
To Next Page
Loading...
