Flight Guidance System (Fgs); General; Mode Selector - Honeywell PRIMUS 1000 Pilot's Manual

4.

Flight Guidance System (FGS)

GENERAL

The flight guidance system consists of a flight director, autopilot, yaw
damper, and controls. The flight director outputs guidance information
and displays guidance cues. The flight director autopilot maintains the
flight profile selected by the flightcrew.
The autopilot controls pitch, roll, and yaw by driving servos that control
the aileron, rudder, and elevator. The autopilot commands the pitch trim
system to reduce loads on the servos.
The yaw damper computes servo commands based on sensor input
only. It is used only for yaw rate damping without regard to the flight path
of the aircraft.
The flight guidance system controls are described below.

MODE SELECTOR

The mode selector, shown in Figure 4–1, engages the FGS flight
director modes. It is a seven or eight button controller with an
annunciator bar that lights inside each button. The flight director
integrates pitch and roll guidance commands to drive the command
bars on the PFD. Using the mode selector, a pilot can select any flight
director mode, except for the go–around mode, which is initiated by
pushing a switch on the pilot's control column.
A28–1146–134
REV 1 Jan/03
R
PRIMUS
Mode Selector
Figure 4–1
1000 Integrated Avionics System
AD–63865,SH1@
Flight Guidance System (FGS)
4-1