曝光台 注意防骗
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desired position and the airspeed approaches maneuvering speed, select FLCH or
VNAV and ensure CLB thrust is set. Verify the airplane levels off at selected
altitude and proper speed is maintained.
If VNAV is used during go-around, the FMC missed approach profile should
contain the appropriate holding speeds and altitudes. Speed intervention may be
used to further modify airspeed as needed. If VNAV ALT is displayed, a
premature level off may occur and selection of FLCH may be required to complete
the climb to the missed approach altitude.
If a diversion to an alternate airport is required, delay use of VNAV until
appropriate FMC entries are completed.
Note: FMC speeds may not comply with speed/altitude restrictions when using
VNAV at low altitudes.
Low Altitude Level Off - Low Gross Weight
When accomplishing a low altitude level off following a go-around at a low gross
weight, the crew should consider the following factors:
• if full go-around thrust is used, altitude capture can occur just after the
go-around is initiated due to the proximity of the level off altitude and the
high climb rate of the airplane
• the AFDS control laws limit F/D and autopilot pitch commands for
passenger comfort
• there may not be enough altitude below the intended level off altitude to
complete the normal capture profile and an overshoot may occur unless
crew action is taken.
To prevent an altitude and/or airspeed overshoot, the crew should consider doing
one or more of the following:
• use the autothrottle
• press TO/GA switch once to command thrust sufficient for a 2,000 fpm
climb rate
• if full go-around thrust is used, reduce to climb thrust earlier than normal
October 31, 2006
777/787 Flight Crew Training Manual
Approach and Missed Approach
Copyright © The Boeing Company. See title page for details.
FCT 777/787 Preliminary (TM) 5.73
• disconnect the AFDS and complete the level off manually if there is a
possibility of an overshoot
• if the autothrottle is not available, be prepared to use manual thrust
control as needed to manage speed and prevent flap overspeed.
Go-Around after Touchdown
If a go-around is initiated before touchdown and touchdown occurs, continue with
normal go-around procedures. The F/D go-around mode will continue to provide
go-around guidance commands throughout the maneuver.
If a go-around is initiated after touchdown but before thrust reverser selection,
auto speedbrakes retract and autobrakes disarm as thrust levers are advanced. The
F/D go-around mode will not be available until go-around is selected after
becoming airborne.
Once reverse thrust is initiated following touchdown, a full stop landing must be
made. If an engine stays in reverse, safe flight is not possible.
Go–Around and Missed Approach - One Engine Inoperative
777-200 - 777-300ER
The missed approach with an engine inoperative should be accomplished in the
same manner as a normal missed approach except use flaps 5 for the go-around
flap setting for a flaps 20 approach or use flaps 20 as the go-around flap setting for
a flaps 25 or 30 approach. After TO/GA is engaged, the AFDS commands a speed
that is normally between command speed and command speed + 15 knots. The
rudder is automatically positioned by the TAC to compensate for differential
thrust with minimal input required from the pilot. Select maximum continuous
thrust when flaps are retracted to the desired flap setting.
777-200 - 777-300ER
Note: If accomplishing a manual go-around with the TAC inoperative, the pilot
must control yaw with rudder and trim. Some rudder pedal pressure may
be required even with full rudder trim.
787-8
The missed approach with an engine inoperative should be accomplished in the
same manner as a normal missed approach except use flaps 5 for the go-around
flap setting for a flaps 20 approach or use flaps 20 as the go-around flap setting for
a flaps 25 or 30 approach. After TO/GA is engaged, the AFDS commands a speed
that is normally between command speed and command speed + 15 knots. The
rudder is automatically positioned to compensate for differential thrust with
minimal input required from the pilot. Select maximum continuous thrust when
flaps are retracted to the desired flap setting.
October 31, 2006
777/787 Flight Crew Training Manual
Approach and Missed Approach
Copyright © The Boeing Company. See title page for details.
5.74 FCT 777/787 Preliminary (TM)
777-200 - 777-300ER
For a multi-autopilot go-around, yaw is initially controlled by the autopilots.
When selecting another roll mode, pitch mode, or when altitude capture occurs
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787机组训练手册Flight Crew Training Manual 787(92)
