Garmin G1000 System Overview
TM
G1000
System Overview
for the Beechcraft A36/G36
Record of Revisions
Revision Date of Revision Revision Page Range Description
A 7/19/05 ----------- Initial release
Garmin G1000 System Overview for the Beechcraft A36/G36 190-00571-00 Rev. A
SYSTEM OVERVIEW
No. 1 GIA 63
Integrated Avionics Unit
System Inegration Processors
I/O Processors
VHF COM
VHF NAV/LOC
GPS
Glideslope
AFCS Mode Logic
Flight Director Calculations
Servo Communication
No. 2 GIA 63
Integrated Avionics Unit
System Integration Processors
I/O Processors
VHF COM
VHF NAV/LOC
GPS
Glideslope
Servo Communication
GTX 32
or GTX 33
Transponder
High-Speed Data Bus (Ethernet)
Reversionary
Control
GEA 71
Engine/Airframe
Unit
GDC 74A
Air Data
Computer
OAT
Airspeed
Altitude
Vertical Speed
GRS 77
AHRS
Attitude
Rate of Turn
Slip/Skid
GMU 44
Magnetometer
Heading
GPS Output
GPS Output
Reversionary
Control
GSA 81
Pitch Servo
Autopilot Calculations
GSA 81
Pitch Trim Servo
Autopilot Calculations
GSA 81
Roll Servo
Autopilot Calculations
GSA 81
Yaw Servo
Autopilot Calculations
2.1 INTRODUCTION
This System Overview Pilot’s Guide provides a basic
description of the G1000 System as it pertains to the
Beechcraft A36/G36. The description includes the Garmin
Automatic Flight Control System (AFCS).
2.2 SYSTEM DESCRIPTION
System. A G1000 system block diagram is given in Figure 2.2.1. Refer to the Pilot’s Guide Appendices for LRU
specifications.
This section gives a brief description of the G1000
190-00571-00 Rev. A Garmin G1000 System Overview for the Beechcraft A36/G36
Figure 2.2.1 G1000 System Block Diagram
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SYSTEM OVERVIEW
• GDU 1040/GDU 1043 – The G1000 features two
displays, the GDU 1040 and GDU 1043. The GDU
1040 is a 10.4-inch LCD display with 1024 x 768
resolution and is configured as a Primary Flight
Display. The GDU 1040 displays the Flight Director
command bars, system annunciations and alerts,
pilot-selectable references, and flight information.
The GDU 1043 is configured as a Multi Function
Display which contains the dedicated AFCS keys
and GPS/Navigation controls. The displays communicate with each other through a high-speed data
bus (HSDB) Ethernet connection. Each display is
also paired via an ethernet connection.
• GMA 1347 – Installed between the MFD and PFD,
the GMA 1347 integrates NAV/COM digital audio,
intercom system and marker beacon controls. The
GMA 1347 communicates with both GIA 63s using
an RS-232 digital interface. The GMA 1347 also
controls manual display reversionary mode.
• GIA 63 – There are two GIA 63s. The GIA 63 func-
tions as a main communication hub, linking all LRUs
with the PFD and the MFD displays. Each GIA 63
contains a GPS receiver, VHF COM/NAV/GS receivers, and system integration microprocessors. Each
GIA 63 is paired with a respective display through
an ethernet connection. The GIAs are not paired
together and do not communicate with each other
directly.
Each GIA 63 also contains the AFCS software
which controls the Flight Director. During normal
operation, the GRS 77 AHRS and GDC 74A Air Data
Computer send attitude and air data information
to the GIA 63s. This information, combined with
GPS and other system data, is used by the Flight
Director and Autopilot. Flight Director commands
are calculated within the #1 GIA 63 and are sent to
the PFD for display and mode annunciation. Flight
information is also sent to the GSA 81 servos for
Autopilot operation. A GIA #1 failure results in the
loss of the AFCS system. Any GIA 63 failure results
in loss of the Autopilot function.
• GRS 77 – The GRS 77 is an Attitude and Heading
Reference System (AHRS) that provides aircraft
attitude and heading information to both the
G1000 displays and the GIA 63s. The unit contains
advanced sensors, accelerometers and rate sensors.
In addition, the GRS 77 interfaces with both the
GDC 74A Air Data Computer and the GMU 44
Magnetometer. The GRS 77 also utilizes GPS signals
sent from the GIA 63. Attitude and heading information is sent using an ARINC 429 digital interface
to both GDU 1040s and GIA 63s. AHRS modes of
operation are discussed later in this document.
• GMU 44 – The GMU 44 Magnetometer measures
local magnetic field information. Data is sent to
the GRS 77 AHRS for processing to determine aircraft magnetic heading. This unit receives power
directly from the GRS 77 and communicates with
the GRS 77 using an RS-485 digital interface.
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190-00571-00 Rev. AGarmin G1000 System Overview for the Beechcraft A36/G36
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 operation. 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:
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.
• Pitch
• Roll
• Pitch Trim
• Yaw
190-00571-00 Rev. A Garmin G1000 System Overview for the Beechcraft A36/G36
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