787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Flight Instruments, Displays -
Electronic Flight Bag - System
Operation
Copyright © The Boeing Company. See title page for details.
D615Z003-TBC 10.80.23
• MEL – items that may affect performance calculations
• CDL – items that may affect performance calculations
After completing the takeoff data entries and selecting CALC, the following
values are displayed in the performance results area:
• FLAP – flap setting
• ACCEL HT – engine out acceleration height
• V1, VR, V2 and VREF speeds
• RWY/INTX – runway and intersection
• TOGW – takeoff gross weight
• TPR or %N1 – takeoff thrust setting
• SEL TEMP – selected/assumed temperature if available
• Engine Failure Procedure (if applicable)
For each takeoff calculation, OPT generates two types of performance if available;
an assumed temperature method (ATM) and a full rated thrust. Both can be
alternately displayed using the SHOW FULL/ATM soft key.
To calculate the takeoff weight complete all the required fields and enter the actual
gross weight in the Takeoff Weight field. Enter any required modifier in the ATM
field and select CALC. The calculated performance figures for the assumed
temperature are displayed in the results area.
Note: If the OPT takeoff weight does not closely match the FMC takeoff weight,
a message regarding verifying the input weight against the FMC weight is
displayed. Performance results are generated, but the message cautions
that the two figures are in disagreement and should be verified.
If needed, select SHOW FULL to display the full thrust data for the TOGW
entered. Select SHOW ATM to redisplay the assumed temperature results.
To calculate the maximum takeoff weight (MTOW) allowed for the entered
conditions, complete all the required fields; but leave the TAKEOFF WEIGHT
field blank. Select CALC to display the MTOW performance data in the results
area (no speeds are calculated). This is sometimes helpful when planning takeoff
performance for the flight.
If speeds are then required, enter the actual takeoff weight in the Takeoff Weight
field and select CALC again. An information message regarding the availability
of assumed temperature may be displayed. Select OK to clear the message and
then select the SHOW FULL soft key to display the full thrust takeoff data
including speeds.
Calculating Landing Performance
Unless otherwise specified, all of the information in this section is referenced to
the Landing page in the OPT application.
February 15, 2010
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