Section 1 System Overview; System Description; Line Replaceable Units (Lru) - Garmin G1000 NXi Pilot's Manual

SECTION 1 SYSTEM OVERVIEW

1.1 SYSTEM DESCRIPTION

This section provides an overview of the G1000 NXi Integrated Avionics System as installed in the Cessna
Nav III. The system presents flight instrumentation, position, navigation, communication, and identification
information to the pilot through large-format displays.
The optional Flight Stream 510 device provides a Bluetooth
device. GPS, ADAHRS/AHRS, ADS-B, traffic, SiriusXM audio, and weather data can then be shared with the
mobile device, and flight plans can be transferred to or from the mobile device. Also, database updates may also
be performed using the Flight Stream 510 WiFi link.

LINE REPLACEABLE UNITS (LRU)

The system consists of the following Line Replaceable Units (LRUs):
• GDU 1050 (1) – The GDU 1050 is configured as a Primary Flight Display (PFD). The display communicates
with the MFD and with the #1 GIA 63W Integrated Avionics Unit through a High-Speed Data Bus (HSDB)
Ethernet connection.
• GDU 1054 (1) – The GDU 1054 is configured as an MFD. The display communicates with the PFD and with
the #2 GIA 63W Integrated Avionics Unit through a High-Speed Data Bus (HSDB) Ethernet connection.
• GIA 63W (2) – Functions as the main communication hub, linking all LRUs with the PFD and MFD. Each
GIA 63W contains a GPS SBAS receiver, VHF COM/NAV/GS receivers, a flight director (FD) and system
integration microprocessors. Each GIA 63W is paired with the PFD and MFD via HSDB connection. The
GIA 63Ws are not paired together and do not communicate with each other directly.
• GSU 75 (1) – Processes data from the pitot/static system as well as the OAT probe to provide pressure
altitude, airspeed, vertical speed and OAT information to the system. This unit also provides aircraft attitude
and heading information via ARINC 429 to the PFD, MFD, and GIA 63W. The GSU 75 contains advanced
sensors (including accelerometers and rate sensors) and interfaces with the GMU 44 to obtain magnetic field
information, and with the GIA 63W to obtain GPS information. ADAHRS/AHRS modes of operation are
discussed later in this document.
• GDC 72 / 74A (1) (Optional) – Processes data from the pitot/static system as well as the OAT probe. This unit
provides pressure altitude, airspeed, vertical speed and OAT information to the system, and it communicates
with the GIA 63Ws, the displays, and the GRS 77/79, using an ARINC 429 digital interface (it also interfaces
directly with the GTP 59). The GDC 74A is designed to operate in Reduced Vertical Separation Minimum
(RVSM) airspace.
• GRS 77 / 79 (1) (Optional) – Provides aircraft attitude and heading information via ARINC 429 to both
displays and both GIA 63Ws. The GRS 77/79 contains advanced sensors (including accelerometers and rate
sensors) and interfaces with the GMU 44 to obtain magnetic field information, with the GDC 74A to obtain
air data, and with both GIA 63/63Ws to obtain GPS information. AHRS modes of operation are discussed
later in this document.
190-02177-00 Rev. A
Garmin G1000 NXi Pilot's Guide for Cessna Nav III
SYSTEM OVERVIEW
® connection between the system and a mobile
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