190-00962-02 Rev. A
Garmin G1000 Pilot’s Guide for the Diamond DA42NG
427
AUTOMATIC FLIGHT CONTROL SYSTEM
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE
AFCS
ADDITIONAL
FEATURES
APPENDICES INDEX
SECTION 7 AUTOMATIC FLIGHT CONTROL SYSTEM
NOTE: The approved Airplane Flight Manual (AFM) always supersedes the information in this Pilot’s Guide.
NOTE: A failure of the primary (#1) Integrated Avionics Unit (IAU) results in loss of the flight director. Any
IAU failure results in loss of the autopilot and manual electric trim.
The GFC 700 is a digital Automatic Flight Control System (AFCS), fully integrated within the G1000 System
avionics architecture. The System Overview section provides a block diagram (Figure 1-1) to support this system
description. GFC 700 AFCS functionality in Diamond DA42NG aircraft is distributed across the following Line
Replaceable Units (LRUs):
•GDU1040PrimaryFlightDisplay(PFD)
•GDU1045Multi-FunctionDisplay(MFD)
•GIA63WIntegratedAvionicsUnits(2)
•GSA80AFCSYawDamperServo(1)
•GSA81AFCSServo(3)
•GSM85orGSM86ServoMounts(4)
The GFC 700 AFCS can be divided into these main operating functions:
•Flight Director (FD)—Flightdirectoroperationtakesplacewithintheprimary(#1)IAU.Flightdirector
commandsaredisplayedonthePFD.Theightdirectorprovides:
– Command Bars showing pitch/roll guidance
–Pitch/rollmodeselectionandprocessing
– Autopilot communication
•Autopilot (AP) — Autopilot operation occurs within the pitch, roll, and pitch trim servo and provides servo
monitoringandautomaticightcontrolinresponsetoightdirectorsteeringcommands,AHRSattitudeand
rate information, and airspeed.
•Yaw Damper (YD) — The yaw servo is self-monitoring and provides Dutch roll damping and turn
coordination in response to yaw rate, roll angle, vertical acceleration, and airspeed.
•Manual Electric Trim (MET) — The pitch trim servo provides manual electric trim capability when the
autopilot is not engaged.
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