787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Performance Inflight
Tex t
787-8/
FAA
Category A Brakes
Copyright © The Boeing Company. See title page for details.
D615Z003-TBC PI.18.11
Alternate Mode EEC
No takeoff speed adjustments are required for operation of EEC in the
alternate mode.
Limit Weight
A simplified method which conservatively accounts for the effects of EEC
in the alternate mode is to reduce the normal mode performance limited
weights. The Limit Weight table provides takeoff field, climb, obstacle,
net level off and landing climb weights. To determine limit weights for
operations with the EEC in the alternate mode, enter the table with the limit
weights for normal mode EEC operation and read the associated limit
weight for each performance condition. The most limiting of the takeoff
weights must be used. The alternate mode EEC Landing Climb limit must
be compared to the Landing Field Length limit and the more limiting of the
two must be used as the landing limit weight. Analysis from the Airplane
Flight Manual - Digital Performance Information may yield less restrictive
limit weights.
Max Takeoff %N1
Takeoff power settings are presented for anti-ice on or off. Max Takeoff
%N1 may be read directly from the tables for the desired pressure altitude
and airport OAT.
The EEC alternate mode 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.
Max Climb %N1
This table shows Max Climb %N1 for a 310/.85 climb speed schedule with
anti-ice off. Enter the table with pressure altitude and TAT to read Max
Climb %N1.
Max Cruise %N1
Maximum Cruise %N1 is presented for .85M, which approximates Long
Range Cruise speed. Enter the table with pressure altitude and TAT to read
Max Cruise %N1.
Go-Around %N1
Go-Around power setting for alternate mode EEC operation is presented
for normal engine bleed for packs on. Go-Around %N1 may be read
directly from the tables for the desired pressure altitude and airport OAT.
February 15, 2010
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