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FLIGHT GUIDANCE AND
CONTROL SYSTEM
GENERAL
The Primus 1000 system includes an autopi-
lot, yaw damper and dual synchronized flight
directors. These functions are all co-located
in two IC-600 Display Guidance Computers
(DGCs) located in the nose avionics bay. Each
IC-600 houses a flight director; however,
only the copilot (right) IC-600 is connected
to the pitch, roll and yaw servos (Figure 16-
3) for the autopilot/yaw damper and rudder
boost functions.
A flight guidance controller (FGC)(Figure
16-46), located in the center of the glareshield
panel, provides the means of engaging the au-
topilot/yaw damper and controlling both flight
director (FD) systems. Lighting of this panel
is controlled through the pilot’s INSTR rheo-
stat. The S/I legends and green indicators are
dimmed through the NAV lights switch.
The autopilot is single channel with a fail pas-
sive design. The monitor system provides for
automatic disconnect in the event of a mal-
function in the flight director or the autopi-
lot/yaw damper.
Both attitude heading reference systems
(AHRS) must be functioning for autopilot op-
eration and both avionics master switches
must be on.
The autopilot provides airplane control in re-
sponse to pitch and roll steering commands
from either flight director.
The yaw damper (YD) provides yaw rate
damping and turn coordination, but makes no
effort to control the flightpath of the airplane.
L E A R J E T 4 5
P I L O T T R A I N I N G M A N U A L
16-78
FOR TRAINING PURPOSES ONLY
FlightSafety
international
Figure 16-46. Flight Guidance Controller (FGC)
FD1
HDG
NAV
APP
BNK
AP
XFR
YD
SPD
FLC
VS
VNV
ALT
FD2
ASEL
SPD
PUSH IAS/M
HDG
PUSH SYNC
PUSH SYNC
PUSH SYNC
CRS 1
CRS 2
Honeywell