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of the nose gear during the turn.
October 31, 2006
777/787 Flight Crew Training Manual
Ground Operations
Copyright © The Boeing Company. See title page for details.
FCT 777/787 Preliminary (TM) 2.11
Turning radius can be reduced by following a few specific taxi techniques. Taxi
the airplane so that the main gear tires are close to the runway edge.This provides
more runway surface to make the turn. Stop the airplane completely with the thrust
at idle. Hold the tiller to the maximum steering angle, release the brakes, then add
thrust on the outboard engine. Only use the engine on the outboard side of the turn
and maintain 5 to 10 knots during the turn to minimize turn radius. Light
intermittent braking on the inside main gear helps decrease turn radius. Stopping
the airplane in a turn is not recommended unless required to reduce the turn radius.
As the airplane passes through 90° of turn, steer to place the main gear
approximately on the runway centerline, then gradually reduce the tiller input as
required to align the airplane with the new direction of taxi. These actions result
in a low speed turn and less runway being used. Wind, slope, runway or taxiway
surface conditions, and center of gravity may also affect the turning radius.
The following diagrams show suggested airplane ground tracks for minimum
radius 180° turns with various runway turnaround configurations. These ground
tracks provide the best maneuver capability while providing the maximum
runway length available for takeoff at the completion of the turn.
October 31, 2006
777/787 Flight Crew Training Manual
Ground Operations
Copyright © The Boeing Company. See title page for details.
2.12 FCT 777/787 Preliminary (TM)
Techniques when using a Circular Turnaround
When abeam center of the
turnaround, stop the
airplane, apply full tiller,
then add thrust to maintain 5
to 10 knots during the turn.
When turn completion
is assured and main
gear are on the runway
centerline, steer toward
runway centerline.
R
Align airplane
near runway edge.
After entering the
turnaround, turn to align
airplane near opposite
side of circular
turnaround.
Steer to maintain flight
deck over edge of taxi
surface. Maintain 5 to 10
knots.
Use momentary
application of inside
brakes, as needed.
Note: Follow turnaround
steering guidance
cues if available.
October 31, 2006
777/787 Flight Crew Training Manual
Ground Operations
Copyright © The Boeing Company. See title page for details.
FCT 777/787 Preliminary (TM) 2.13
Techniques when using a Hammerhead Turnaround
When turn completion
is assured and main
gear are on the runway
centerline, steer toward
runway centerline.
When abeam center of the
turnaround, stop the
airplane, apply full tiller,
then add thrust to maintain 5
to 10 knots during the turn.
Align airplane
near runway edge.
Use momentary
application of inside
brakes, as needed.
Note: Follow turnaround
steering guidance
cues if available.
October 31, 2006
777/787 Flight Crew Training Manual
Ground Operations
Copyright © The Boeing Company. See title page for details.
2.14 FCT 777/787 Preliminary (TM)
Techniques when using a Hammerhead Turnaround
180 Degree (Pivot) Turns in Less than 147.6 feet / 45 m
777-200 - 777-300ER
If a non-normal or emergency situation requires that a turn be performed on a
147.6 feet (45 m) wide runway or taxi surface, towing is the preferred method. If
a tow tug is not available and the turn must be performed, a pivot turn is
recommended provided the following conditions are met:
• due to potentially high structural loads on pavement that is not solid, this
method must not be used on a routine basis
• the pavement surface is sound and free of loose debris
• the airplane does not exceed maximum landing weight.
When abeam center of the
turnaround, stop the
airplane, apply full tiller,
then add thrust to maintain 5
to 10 knots during the turn.
When turn completion
is assured and main
gear are on the runway
centerline, steer toward
runway centerline.
After entering the
turnaround, turn to
align airplane near
opposite side of
circular turnaround.
Align airplane
near runway edge.
Use momentary
application of inside
brakes, as needed.
Note: Follow turnaround
steering guidance
cues if available.
Steer to place the nose
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787机组训练手册Flight Crew Training Manual 787(29)
