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(8) Lateral Go-Around Mode
Lateral go-around mode generates a heading hold command, with a 5 degree
bank limit. Selection of lateral go-aroundmode turns on both flight directors,
disengages the autopilot, and clears all other lateral modes. Lateral and vertical
go-around mode selections are coincident. When lateral go-around causes an
autopilot disengage, the resultant autopilot disengage warning may be cancelled
by another push of a TOGA switch, or by pushing the AP disconnect switch.
Lateral go-around mode is selected by pushing one of the thrust lever-mounted
TOGA switches while airborne. Lateral go-around mode is cleared by selection of
FD SYNC or another lateral mode.
Lateral go-around is annunciated with a green GA message in the lateral capture
field on the primary flight display.
E. Vertical Mode of Operation
(1) Pitch Mode
When pitch mode is selected, the pitch reference (pitch command on the primary
flight display) is set to the current pitch angle. Pitch mode generates commands
to maintain the pitch reference value.
The pitch reference value can be changed using the VS pitch wheel. Rotation of
the VS pitch wheel will change the pitch reference by 1/2 degree per click. The
pitch reference is reset to the current pitch attitude upon either autopilot
engagement, transferring to pitch mode, or synchronization.
When the preselected altitude is captured, rotating the VS pitch wheel also
rearms the altitude preselect mode.
When capturing or tracking a preselected altitude, a new preselected altitude
must be chosen prior to the selection of pitch mode, to avoid an immediate
recapture of the existing preselected altitude.
Vol. 1 03--20--13
REV 56, Jan 31/03
AUTOMATIC FLIGHT CONTROL SYSTEM
Flight Control and Guidance
Flight Crew Operating Manual
CSP A--013
MASTER
Pitch mode is automatically selected when no other vertical mode is active, and
the flight director is on. Rotating the VS pitch wheel on the flight control panel will
manually select pitch mode when the flight director is on, unless in glideslope
capture or VS mode. Pitch mode is cleared by the selection of a vertical hold
mode, or by a vertical mode capture.
Pitch mode is annunciated with a green PTCH message in the vertical capture
field on the primary flight display.
(2) Vertical Take-Off Mode
Vertical take-off mode generates a 15 degree pitch-up command. Loss of an
engine changes the pitch-up command to 10 degrees.
Selecting vertical mode turns on both flight directors, disengages the autopilot,
clears all other vertical modes and switches the flight guidance commands to a
dual independent configuration. Lateral and vertical take-off mode selections are
coincident.
When take-off causes an autopilot disengagement, the resultant warning may be
cancelled by another push of a TOGA switch, or by pushing the AP disconnect
switch.
Vertical take-off mode is selected by pushing one of the thrust lever-mounted
TOGA switches while on the ground. Vertical take-off mode is cleared by
engaging the autopilot, by selecting , or by the selection or capture of another
active mode.
Vertical take-off mode is annunciated with a green TO message in the vertical
capture field on the primary flight display.
(3) Altitude Preselect Mode
Altitude preselect mode generates commands to capture and track preselected
altitude. The barometric preselected altitude is displayed on the primary flight
display, and controlled via the ALT knob on the flight control panel.
Altitude preselect mode is armed upon selection. The capture point is a function
of closure rate, with the capture point moving away from the preselected altitude
for high closure rates.
Capture will not occur if the preselected altitude is slewed through current
altitude. At capture, the previously active vertical mode is cleared.
If the preselect altitude is changed, or if the VS pitch wheel is rotated during
altitude capture, the autopilot or flight director continues to capture the original
preselected altitude.
If a new preselect altitude is not set, then selection of IAS, MACH, PTCH or VS
mode, will result in the current altitude being captured.
REV 56, Jan 31/03
Vol. 1 03--20--14
AUTOMATIC FLIGHT CONTROL SYSTEM
Flight Control and Guidance
Flight Crew Operating Manual MASTER
CSP A--013
After capturing preselected altitude (altitude track), if preselect altitude is
changed, altitude hold is automatically selected and altitude preselect rearmed.
Pushing in the ALT knob will cancel aural and visual alerts associated with the
preselected altitude.
Altitude preselect mode is automatically selected upon selection of any vertical
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