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at the radio bus data to check the echoed frequency.
Pilot’s Manual
5-64 PM-132A
The CDR controls are as follows:
•Transfer Key — Alternately selects either the COM (top) or
NAV (bottom) frequency to be connected to the tuning
knobs.
•Tuning Knobs — Used to change the frequency indicated
by the tuning cursor.
•Normal/Emergency Mode Switch — This rotary knob provides
alternate selection of Normal and Emergency modes.
•NAV AUDIO On/Off Switch — This alternate action push
button switch is used to toggle NAV audio ON or OFF
when in the EMER audio mode on the audio control panel.
• Squelch (SQ) Switch — Used to toggle COM squelch on or
off.
123RMT
COM
NAV
NAV AUDIO
PRE
NAV
TX SQ
E
MR
G
SQ NAV
AUDIO
MODES
CLEARANCE DELIVERY RADIO
Figure 5-17
F40-050000-517-01
Pilot’s Manual
PM-132A 5-65
FLIGHT GUIDANCE CONTROL SYSTEM
The Primus 1000 system includes an autopilot, yaw damper and dual
synchronized flight directors. These are all co-located in two IC-600 display
flight guidance computers located in the nose avionics bay. Each
IC-600 houses a flight director; however, only the copilot IC-600 is connected
to the pitch, roll and yaw servos for the autopilot/yaw damper
and rudder boost functions. A flight guidance controller, located in the
center of the glareshield, provides the means of engaging the autopilot/
yaw damper and controlling both Flight Director (FD) systems. It
also contains a transfer (XFR) switch that allows the crew to select either
the left or right flight director as master and for autopilot coupling.
The autopilot is a single channel with a fail passive design. The monitor
system provides for automatic disconnect in the event of a malfunction
in autopilot, yaw damper, or rudder boost. All automatic disconnects,
which result from monitor trips, will be stored in a non-volatile memory
for later recall by technicians.
FLIGHT DIRECTOR
The flight director system, utilizing two separate IC-600 computers,
provides dual flight director computations, either of which can be coupled
to the autopilot. Only one flight director can be coupled to the autopilot
at a time. In this case the coupled flight director is classified as
the master flight director, and the other flight director is classified as the
slave flight director. The flight director can couple to Short Range Navigation
(SRN) units (e.g. VOR, ILS), dependent upon which SRN is being
displayed as a NAV data source on the Primary Flight Display
(PFD). The flight director will use the displayed SRN data on the associated
PFD for command-bar control computations. The flight director
can be coupled to optional Long-Range Navigation (LRN) units (e.g.
flight management system) if it is installed and selected as the NAV
data source and displayed on the associated PFD. The flight director
utilizes the lateral and/or vertical steering commands from the LRN in
the command control computations. Each flight director uses the displayed
on-side Air Data Computer (ADC) data for all vertical modes
and gain programing. The flight director modes are synchronized in a
manner that allows selection of the modes to be accomplished by the
single set of FD mode select buttons on the Flight Guidance Controller
(FGC), see Figure 5-18. The FD mode select buttons on the FGC panel
are momentary action, and each has a vertical green bar that illuminates
whenever the mode is selected.
Pilot’s Manual
5-66 PM-132A
FLIGHT GUIDANCE CONTROLLER (FGC)
The flight guidance controller (Figure 5-18) is the prime controller for
the flight director and the autopilot/yaw damper. Located on the center
glareshield, the FGC provides the means, via push button switches,
for flight director mode selection, couple status and autopilot/yaw
damper engage selection. Flight director modes engage status is indicated
to the crew via a green light on the right edge of each mode
switch, which is illuminated when the mode is active and extinguished
when the mode is inactive or dropped. The controller also has several
rotary controls enabling selection of IAS, MACH, and VS targets, altitude,
course and heading. All push button selections are signaled to
both IC-600s via a discrete output from the FGC. The IC-600s then provide
the drive to illuminate the appropriate light on the FGC.
The FGC annunciations and controls are as follows:
FD 1/2 buttons — The flight director buttons (FD 1 and FD 2) are located
on the upper left/right corners of the flight guidance controller. Depressing
　
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