Garmin G1000 MOONEY SYSTEMOVERVIEW M20
TM
G1000
system overview for
the Mooney M20M & M20R
Record of Revisions
Revision Date of Revision Revision Page Range Description
A 10/18/04 2-1 – 2-11 Production Release.
190-00442-00 Rev. AGarmin G1000 System Overview for Mooney M20M & M20R
SYSTEM OVERVIEW
2.1 SYSTEM DESCRIPTION
Garmin® International Inc., a unit of Garmin Ltd.
introduces the G1000 Integrated Cockpit System for
Mooney M20M and M20R aircraft. The G1000 includes
the following Line Replaceable Units (LRUs):
• GDU 1040 Primary Flight Display (PFD)
• GDU 1040 Multi Function Display (MFD)
• GIA 63 Integrated Avionics Units (2)
• GEA 71 Engine/Airframe Unit
• GDC 74A
• GRS 77 Attitude & Heading Reference System
(AHRS)
• GMU 44 Magnetometer
• GMA 1347 Audio System with integrated Marker
Beacon Receiver
• GTX 32 Modes A/C or GTX 33 Mode S
Transponder
LRUs are further described in Section 2.2. All LRUs
have a modular design, which greatly eases troubleshooting and maintenance of the G1000 system. A top-level
G1000 block diagram is given in Figure 2.2.1 to support
the description of the system.
Air Data Computer (ADC)
and the right display is configured as a Multi Func
tion Display. Both GDU 1040s link and display all
functions of the G1000 system during flight. The
displays communicate with each other through a
High-Speed Data Bus (HSDB) Ethernet connection.
Each display is paired with a GIA 63 Integrated
Avionics Unit, also via Ethernet connection.
• GMA 1347 – The GMA 1347 integrates NAV/COM
digital audio, intercom system and marker beacon
controls. The GMA 1347 also controls manual
display reversionary mode (large red button). The
GMA 1347 is installed between the MFD and PFD.
The GMA 1347 communicates with both GIA 63s
using RS-232 digital interface.
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2.2 LRU DESCRIPTIONS
• GDU 1040 – The GDU 1040 has a 10.4-inch
LCD display with 1024 x 768 resolution. The left
display is configured as a Primary Flight Display
190-00442-00 Rev. A Garmin G1000 System Overview for Mooney M20M & M20R
2-1
SYSTEM OVERVIEW
• GIA 63 – The GIA 63 is the central ‘Integrated
Avionics Unit’ of the G1000 system. The GIA 63
functions as a main communications hub, linking all
LRUs with the PFD and 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 GDU 1040 display
through Ethernet. GIAs are not paired together and
do not communicate with each other directly.
• GRS 77 – The GRS 77 is an Attitude and Heading
Reference System (AHRS) that provides aircraft attitude and heading information to 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 are
sent using an ARINC 429 digital interface to both
GDU 1040s and GIA 63s.
• GMU 44 – The GMU 44 Magnetometer measures
local magnetic field information. Data is sent to
the GRS 77 ARHS for processing to determine aircraft magnetic heading. This unit receives power
directly from the GRS 77 and communicates with
the GRS 77 using RS-485 digital interface.
• GDC 74A – The GDC 74A Air Data Computer
processes information from the pitot/static system
and the outside air temperature (OAT) sensor. The
GDC 74A provides pressure altitude, airspeed,
vertical speed, and OAT information to the G1000
system. The GDC 74A communicates with both
GIA 63s, GDU 1040s, and GRS 77 using ARINC 429
digital interface.
2-2
190-00442-00 Rev. AGarmin G1000 System Overview for Mooney M20M & M20R
SYSTEM OVERVIEW
• GEA 71 – The GEA 71 receives and processes signals
from 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
RS-485 digital interface.
• GTX 32 – The GTX 32 is a solid-state transponder
providing Modes A and C operation. The PFD
provides control and operation of the GTX 32.
The transponder communicates with both GIA 63s
through RS-232 digital interface.
• GTX 33 – The GTX 33 is a solid-state Mode S
transponder providing Modes A, C, and S operation. The PFD provides control and operation of
the GTX 33. The transponder communicates with
both GIA 63s through RS-232 digital interface.
NOTE: See the Aircraft Flight Manual to deter-
mine which transponder is installed in your
aircraft.
190-00442-00 Rev. A Garmin G1000 System Overview for Mooney M20M & M20R
2-3
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