787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Performance Inflight
Text
787-8/
FAA
Category A Brakes
Copyright © The Boeing Company. See title page for details.
PI.18.12 D615Z003-TBC
The alternate mode EEC schedule provides equal or greater thrust than the
normal mode for the same lever position. Thrust protection is not provided
in the alternate mode and maximum rated thrust is reached at a thrust lever
position less than full forward. As a result, thrust overboost can occur at
full forward thrust lever positions.
Alternate Mode EEC, Engine Inoperative
Initial Max Continuous %N1
Initial Max Continuous %N1 settings for use following an engine failure
are presented. The table is based on the typical all engine cruise Mach
number of .85 to provide a target %N1 setting at the start of driftdown.
Once driftdown is established, the Max Continuous %N1 table should be
used to determine %N1 for the given conditions.
Max Continuous %N1
Max Continuous %N1 settings are presented as a function of pressure
altitude and TAT for engine inoperative speeds of 320, 280, 240, and 200
KIAS. Power settings may be interpolated for intermediate airspeeds.
Gear Down
This section contains performance for airplane operation with the landing
gear extended for all phases of flight.
Note: The Flight Management Computer System (FMCS) does not contain
special provisions for operation with landing gear extended. As a result,
the FMCS will generate inaccurate enroute speed schedules, display non-
conservative predictions of fuel burn, estimated time of arrival (ETA),
maximum altitude, and compute overly shallow descent path. An accurate
estimated time of arrival is available if current speed or Mach is entered
into the VNAV cruise page. Estimates of fuel remaining at waypoints or
the destination may be computed by the crew based upon current fuel flow
indications, but should be updated frequently.
Tables for gear down performance in this section are identical in format
and used in the same manner as tables for the gear up configuration
previously described.
February 15, 2010
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