User Guide

190-00571-00 Rev. A Garmin G1000 System Overview for the Beechcraft A36/G36
2-3
SYSTEM OVERVIEW
• GDC 74A – The GDC 74A Air Data Computer
processes information from the pitot/static system
as well as the outside air temperature (OAT) sensor.
The GDC 74A provides pressure altitude, airspeed,
vertical speed and OAT information to the G1000
system, and communicates with the GIA 63s,
GDU 1040s and GRS 77 using an ARINC 429 digital
interface.
• GEA 71 – The GEA 71 receives and processes signals
from the engine and airframe sensors. Sensor types
include engine temperature and pressure sensors as
well as fuel measurement and pressure sensors. The
GEA 71 communicates with both GIA 63s using an
RS-485 digital interface.
• GTX 33 – The GTX 33 is a solid-state, Mode-S
transponder that provides Modes A, C and S opera-
tion. The GTX 33 is controlled through the PFD
and communicates with both GIA 63s through an
RS-232 digital interface.
• SA 81 AFCS Servos – Four GSA 81 servos are
used for automatic control of the aircraft flight
control surfaces. One servo is used for the each of
the following:
• Pitch
• Roll
• Pitch Trim
• Yaw
Each servo moves its respective aircraft control
surface in response to commands generated by
internal servo calculations. For pitch trim, the servo
positions the aircraft pitch trim surface in response
to commands generated by automatic and manual
electric pitch trim calculations. Calculations are
performed using data sent through the common
serial data bus from the GIA 63. Manual Electric
Pitch Trim is also provided in response to the Manual
Electric Trim (
MET) switch.
Optional Equipment
This System Overview only covers the baseline
configuration of the G1000. Descriptions and procedures
relating to optional equipment is covered in the G1000
Optional Equipment Pilot’s Guide. Consult a Garmin
authorized service center for A36/G36 optional equipment
availability and configuration.