Garmin GI 275, Pilot'S Manual

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Garmin GI 275 Pilot's Guide 190-02246-01 Rev. A
171
Autopilot
System Overview
Flight Instruments
EIS
Navigation
Hazar
d A
voidance
Autopilot
Additional F
eatur
es
Appendices
Index
SECTION 6 AUTOPILOT
6.1 OVERVIEW
WARNING: Do not rely on the Autopilot to level the aircraft at the minimum approach
altitude when flying an approach with vertical guidance.
NOTE: Refer to the applicable Flight Director / AFCS Controller Manual for further
information on how to operate an external Flight Director / AFCS Controller, if
configured.
The GI 275 Multi-Function Instrument (MFI) receives and analyzes inputs from an external
Flight Director, which in turn provides pitch, roll, and yaw gyro outputs to an Autopilot. The
Autopilot operates the flight control servos which provides automatic flight control.
The MFI is capable of providing Yaw Damper control. The Yaw Damper reduces Dutch
Roll tendencies and coordinates turns. It can operate independent of the Autopilot and may
be used during normal hand-flown maneuvers. Yaw rate commands are limited by the Yaw
Damper.
NOTE: An external Flight Director / AFCS Controller is required to fully operate the
Autopilot capabilities of the MFI.
To utilize the Autopilot functionality, the following hardware is required:
• GI 275-20 (Basic with ADAHRS and Autopilot Interface)
• GMU 11 Magnetometer or GMU 44B (if applicable)
• Flight Director
• AFCS Controller
The MFI is also capable of displaying Flight Director information when connected to an
external Flight Director. If configured, the following functions are provided:
• The capability to have GPS 1/2 and NAV 1/2 inputs for source selection from a navigation
system and output signals for NAV and GPSS steering
• The capability to capture vertical navigation (e.g., glideslope, glidepath)
• The capability to provide CDI/VDI preview if a GTN (GPS/NAV/COM/MFD) is installed