Boeing 787-8 - Reduced Thrust Takeoff

787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Flight Management, Navigation -
Flight Management Computer
Copyright © The Boeing Company. See title page for details.
11.32.2 D615Z003-TBC
• senses and transmits autothrottle failures
• commands thrust equalization through the engine electronic controls
[Option – RR engines]
Thrust limits are expressed as TPR limits. Thrust equalization references TPR.
[Option – GE engines]
Thrust limits are expressed as N1 limits. Thrust equalization references N1.
Thrust management calculates a reference thrust for the following thrust settings:
[Option – RR engines]
With VNAV active, the reference thrust limit changes for the phase of flight.
Thrust settings can be selected on the THRUST LIM page. The reference thrust
limit displays above EICAS TPR indications.
[Option – GE engines]
With VNAV active, the reference thrust limit changes for the phase of flight.
Thrust settings can be selected on the THRUST LIM page. The reference thrust
limit displays above EICAS N1 indications.
The flight crew can specify the thrust reduction height where the change from
takeoff to climb thrust takes place by making an entry on the CDU TAKEOFF
REF page. This can be an altitude from 400 feet to 9,999 feet, an entry of 1 for
flaps 1, or an entry of 5 for flaps 5.
Reduced Thrust Takeoff
Reduced thrust takeoffs lower EGT and extend engine life.
Derate/Variable Takeoff Rating
[Option – Takeoff thrust derate]
Two fixed derates can be selected on the THRUST LIM page. TO 1 and TO 2
reduce takeoff thrust by percentages specified by the operator on the AIRLINE
POLICY page. The derate percentages can be set between maximum takeoff
thrust and the maximum certified derate in one percent increments. The Airplane
Flight Manual (AFM) provides performance data for these derates.
• TO – takeoff
• TO 1 – takeoff one
• TO 2 – takeoff two
• D–TO – assumed temperature
takeoff
• D–TO 1 – derate one assumed
temperature takeoff
• D–TO 2 – derate two assumed
temperature takeoff
• CLB – climb
• CLB 1 – climb one
• CLB 2 – climb two
• CON – continuous
• G/A – go–around
October 31, 2007