Pilot's Guide

190-00617-00 Rev. AGarmin G1000 Pilot’s Guide for the Tiger AG-5B
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SYSTEM OVERVIEW
• GIA 63 – The GIA 63 is the central Integrated
Avionics Unit (IAU) of the G1000 system. The
GIA 63 is the main communications 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 GDU 1040 display
through an Ethernet connection. The GIAs 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 both the
G1000 displays and the GIA 63s. The unit con
-
tains advanced sensors, accelerometers, and rate
sensors. In addition, the GRS 77 interfaces with
the GDC 74A Air Data Computer and the GMU 44
Magnetometer. The GRS 77 also utilizes two GPS
signal inputs sent from the GIA 63s. Attitude and
heading information is sent using an
ARINC 429
digital interface to both GDU 1040s and GIA 63s.
The 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 air-
craft magnetic heading. This unit receives power
directly from the GRS 77 and communicates with
the GRS 77 using an RS-485 digital interface.
• GDC 74A – The GDC 74A Air Data Computer
processes information received 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 and communicates with the GIA 63s,
GDU 1040s and GRS 77 using an ARINC 429 digital
interface.
System Overview.indd 2 7/7/2005 8:45:43 AM