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ROLLOUT
SPD LOC G/S
G/S
VNAV PTH
LOC
SPD LNAV
SPD LOC G/S
ROLLOUT FLARE
G/S
SPD LOC VNAV PTH
IDLE ROLLOUT FLARE
LOC FLARE
ROLLOUT
IDLE
LAND 3
A/P
A/P
LAND 3
A/P
500 feet radio altitude
Runway align starts
TO/GA is armed but not displayed
200 feet radio altitude
LAND 3
LAND 3
APP selected Below 1500 feet 2 feet radio altitude
25-50 feet radio altitude
40-60 feet radio altitude
G/S capture
LOC capture
radio altitude
Thrust levers retard
LAND 2 annunciation
inhibited
787 Flight Crew Operations Manual
Automatic Flight -
System Description
4.20.18 Boeing Proprietary
Go–Around
TO/GA arms and the reference thrust limit changes to GA when the flaps are out
of UP or glideslope is captured.
Pushing either TO/GA switch activates a go-around. The mode remains active
even if the airplane touches down while executing the go–around.
When the flight director switches are not on, pushing either TO/GA switch
displays the flight director bars.
The TO/GA switches are inhibited when on the ground and enabled again when
in the air for a go–around or touch and go.
With the first push of either TO/GA switch:
• the PFDs and HUDs display roll and pitch guidance to fly the go–around
• the autothrottle activates in thrust (THR) mode for a 2,000 FPM climb
• the AFDS increases pitch to hold the selected speed as thrust increases
• if current airspeed remains above the target speed for 5 seconds, the target
airspeed is reset to current airspeed, (to a maximum of the IAS/MACH
window speed plus 25 knots).
• if a valid missed approach path exists in the FMC, LNAV automatically
arms and engages:
• above 50 feet radio altitude when autopilot is not engaged, or
• above 200 feet radio altitude when autopilot is engaged.
Note: During go-around from a LAND 2 or LAND 3 approach, automatic
LNAV engagement causes disconnect of autopilot rudder control. If
executing an engine out missed approach with TAC inoperative,
manual rudder control may be required to prevent large roll and yaw
excursions.
With the second push of either TO/GA switch:
• the autothrottle activates in the thrust reference (THR REF) mode for full
go–around thrust.
TO/GA level–off:
• at the selected altitude, the AFDS pitch mode changes to altitude hold
(ALT)
• if altitude is captured, or if V/S or FPA is engaged, MCP speed is
automatically set to:
• the flap placard speed minus 5 knots
• 250 knots if flaps are up, or
• a speed value entered in the IAS/Mach window after TO/GA was
pushed
• go–around remains the engaged roll mode until LNAV automatically
engages or another mode is selected.
787 Flight Crew Operations Manual
Automatic Flight -
System Description
Boeing Proprietary 4.20.19
Automatic Flight Go–Around Profile
Automatic Flight Windshear Recovery
The AFDS provides windshear recovery guidance by means of the normal
go–around pitch and roll modes. Go–around is engaged by pushing a TO/GA
switch. The AFDS commands a pitch–up of 15 degrees or slightly below the pitch
limit, whichever is lower.
SPD VNAV PTH
THR
A/P
A/P
A/P
A/P
TO/GA TO/GA
THR LNAV TO/GA
LNAV
THR LNAV TO/GA
THR REF LNAV VNAV SPD
A/P
Path
After flap
At flap retraction
retraction, push
VNAV (or FLCH)
VNAV engages
with autothrottle
in THR REF (or
FLCH engages
with autothrottle
in THR mode)
capture
Above 200 feet
altitude, set speed
to maneuvering
speed for the
desired flap
Push TO/GA
switch, LNAV
engages
RA, LNAV
LNAV
arms
Above 400 feet
roll mode
RA, verify desired
787 Flight Crew Operations Manual
Automatic Flight -
System Description
4.20.20 Boeing Proprietary
As rate of climb increases, the AFDS transitions from pitch to airspeed control.
The target airspeed is IAS/MACH window airspeed or current airspeed,
whichever is greater when TO/GA is engaged. If current airspeed remains above
the selected speed for 5 seconds, the selected airspeed is reset to current airspeed,
(to a maximum of the IAS/MACH window speed plus 25 knots).
Flight Envelope Protection
There are three forms of flight envelope protection in the autopilot:
• stall protection
• overspeed protection
　
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本文鏈接地址：787機組操作手冊Flight Crew Operations Manual 2(9)