Honeywell SPZ-8000 Maintenance Manual page 235

7. B. (13) IAS/MACH and SPD Button, and SPEED Window and Knob -
The speed knob
allows the pilot to manually input
a speed target to the system.
Speed values up to
VH~M can be set.
This knob is active anytime
I
Jo
the
SPD button annuncia es manual (MAN).
The speed values are used
for the VNAV or FLCH mode.
If the
autothrottles are engaged in a
speed hold mode, the speed knob is also
used
to set a speed value
for autothrottles operation.
When MAN is not annunciated, the speed value is automatically
supplied to the system from the
FMS.
The VNAV or FLCH modes then
use this speed value. The autothrottles
also use the same speed
value for their functions.
In manual speed, the IAS/MACH button
changes the SPEED window display from IAS to MACH. The PFD
annunciates IAS or MACH and also displays the selected speed target
in the IAS or MACH target areas.
(14) Heading Select (HDG SEL) Knob, SYNC Button, and Heading Window -
The HOG SEL knob sets the desired heading and positions the heading
bug on the PFD. The selected heading is displayed
in the HEADING
window and also on the PFD. A push-to-sync button, incorporated in
the knob, causes the bug to synchronize to the current aircraft
heading.
(15) Vertical Speed (V/S) Button and VERT SPEED Window and Knob - The
vertical speed knob is
used to input values of vertical
speed to
the system. The VERT SPEED window and the V/S target area on the
PFD display the selected value when the V/S mode button is
annunciated ON. While TCS is engaged, the PFD displays dashes; the
VERT SPEED window blanks.
(16) Altitude Preselect Knob and ALTITUDE Window -
The altitude
preselect knob controls the preselect altitude displayed in the
ALTITUDE window and on the PFD. The system assumes that this
altitude is a clearance altitude for all flight regimes except
final approach. For this
reason, the ALTITUDE window is always
active.
(17) Course (CRS) Select Knob and SYNC Button - The CRS knob allows
selection of VOR, MLS, or ILS course by the positioning of the
course select pointer on the PFD. The selected course is also
displayed as a digital readout on the PFD. A push-to-sync button,
incorporated in the knob, causes the course select pointer to sync
to the bearing (track, if applicable) of the selected NAV Source.
If the applicable bearing or track information is not displayed on
the ND, the sync feature is disabled.
22-14-00
Page 198.53/198.54
Apr 15/93
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