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altitude window below the current airplane altitude, the autopilot
maintains the altitude at which VNAV is selected.
• With the VNAV ALT pitch mode engaged, the autothrottle operates in the
speed (SPD) mode.
2 LNAV Light
3 Vertical Navigation (VNAV) Switch
787 Flight Crew Operations Manual
Automatic Flight -
Controls and Indicators
4.10.8 Boeing Proprietary
• With the VNAV PTH pitch mode engaged, the autothrottle operates in the
following modes:
• for climb or cruise – operates in the speed (SPD) mode
• for descent – operates in the IDLE, HOLD, or speed (SPD) mode.
• VNAV pitch guidance is available with one engine inoperative.
VNAV is disengaged:
• by engaging TO/GA, FLCH SPD, V/S, FPA, ALT or G/S pitch mode
• if there is a dual FMC failure.
Note: VNAV functionality may still be available. Refer to Chapter 11,
Flight Management, Navigation - Flight Management Computer.
• if all three FMCs fail.
VNAV is disarmed by:
• pushing the VNAV switch a second time, or
• arming APP.
Illuminated (white) – the VNAV mode is armed or engaged.
Push –
• FLCH SPD is displayed on the PFD and HUD pitch flight mode
annunciator as the pitch mode.
• If the IAS/MACH window is blank, the IAS/MACH window opens to the
FMC target speed, if valid. If not valid, the IAS/MACH window opens to
the current speed.
• When changing from TO/GA to FLCH:
• if the current speed is greater than the IAS/MACH window speed, the
IAS/MACH window speed changes to the current speed.
• if the current speed is less than the IAS/MACH window speed, the
IAS/MACH window speed does not change.
• The autothrottle activates:
• for climb – activates in THR mode; the thrust limit is CLB thrust
• for descent – activates in THR mode, followed by HOLD if the thrust
levers reach idle.
Illuminated (white) – the flight level change mode is engaged.
4 VNAV Light
5 Flight Level Change (FLCH) Switch
6 Flight Level Change Light
787 Flight Crew Operations Manual
Automatic Flight -
Controls and Indicators
Boeing Proprietary 4.10.9
Autopilot Flight Director Heading, Track, and Bank Angle
Controls
Push – alternately changes the upper line of the heading/track window, PFD,
HUD, and ND selected heading/track references between heading and track. Also
changes the PFD and HUD roll flight mode annunciators, if the HDG or TRK
mode is engaged.
Upper line displays the selected heading or track and lower line displays uplinked
ATC heading or track target.
The selected heading or track is displayed on the PFD, HUD and ND.
If approach is armed, the heading/track in the MCP window automatically
changes to the selected ILS front course heading at LOC capture.
Upper line displays 360 degrees and lower line is blank when power is first
applied.
The ATC uplink function is enabled when the upper window and uplinked
clearances are both heading values or both track values. If not both heading or
track, pushing the heading/track reference switch will display the uplinked value.
For immediate clearances, pushing the data link ACCEPT button displays the
clearance heading or track value in the lower line of the window. Pushing the
transfer (XFR) switch transfers the value from the lower line to the upper line.
Pushing the data link CNCL button removes the clearance from the lower line.
For conditional clearances, pushing the ACCEPT button displays the new heading
or track value automatically in the lower line only after the clearance condition is
met.
1 Heading/Track (HDG/TRK) Reference Switch
2 Heading/Track Window
3 ATC Uplinked Heading or Track
DOWN
UP
30
HOLD VS/FPA
XFR
UL RL
HDG 200
200
AUTO
10
BANK
LIMIT
HDG TRK V/S FPA
V/S+2000
SEL
MODE CONTROL PANEL (MCP) PRELIMINARY
6
5
7
1
2
4 3
9
8
787 Flight Crew Operations Manual
Automatic Flight -
Controls and Indicators
4.10.10 Boeing Proprietary
Uplinked clearances are preceeded by the letters "UL". Clearances containing a
turn direction are also displayed preceeded by "L" or "R".
Push –
• Transfer the value from the lower line to the upper line. If upper line was
blank/closed, it now opens to the uplinked ATC value. Lower line blanks
after the transfer.
Rotate – sets the AFDS commanded bank limit when in the heading select (HDG
SEL) or track select (TRK SEL) roll mode as follows:
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787机组操作手册Flight Crew Operations Manual 1(138)
