190-00962-04 Rev. A
Garmin G1000 Pilot’s Guide for the Diamond DA42NG
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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 Aircraft Flight Manual Supplement (AFMS) 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 Garmin AFCS 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. Garmin AFCS functionality in Diamond DA42NG aircraft is distributed across the
following Line Replaceable Units (LRUs):
• GDU 1040 Primary Flight Display (PFD)
• GDU 1045 Multi-Function Display (MFD)
• GIA 63W Integrated Avionics Units (2)
• GSA 80 AFCS Yaw Damper Servo (1)
• GSA 81 AFCS Servo (3)
• GSM 85 or GSM 86 Servo Mounts (4)
The Garmin AFCS can be divided into these main operating functions:
• Flight Director (FD) — Flight director operation takes place within the primary (#1) IAU. Flight director
commands are displayed on the PFD. The flight director provides:
– Command Bars showing pitch/roll guidance
– Pitch/roll mode selection and processing
– Autopilot communication
• Autopilot (AP) — Autopilot operation occurs within the pitch, roll, and pitch trim servo and provides servo
monitoring and automatic flight control in response to flight director steering commands, AHRS attitude and
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.