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190-01255-00 Rev. B
Garmin G1000H
™
Pilot’s Guide for the Bell 407GX
2
SYSTEM OVERVIEW
1.2 LINE REPLACEABLE UNITS (LRU)
•
GDU 1040H
(2) – One unit is configured as a PFD, the other as an MFD, each featuring a 10.4-inch LCD with
1024 x 768 resolution. The unit installed on the right/pilot side is designated as the PFD, and the one installed
on the left/copilot side is designated as the MFD. These units communicate with each other and with the on-
side GIA 63H Integrated Avionics Unit through a High-Speed Data Bus (HSDB) connection.
•
GIA 63H
(2) – Functions as the main communication hub, linking all LRUs with the on-side PFD. Each GIA 63H
contains a GPS SBAS receiver, VHF COM/NAV/GS receivers, a flight director (FD) and system integration
microprocessors. Each GIA 63W is paired with a respective GDU 1040H via HSDB connection. The GIA 63Hs
are not paired together and do not communicate with each other directly.
•
GDC 74H
(1) – 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 G1000H system, and it communicates
with the each GIA 63H, GDU 1040H and GRS 77H, using an ARINC 429 digital interface (it also interfaces
directly with the GTP 59). The GDC 74H is designed to operate in Reduced Vertical Separation Minimum
(RVSM) airspace.
•
GEA 71H
(1) – Receives and processes signals from the engine and airframe sensors. This unit communicates
with both GIA 63Hs using an RS-485 digital interface.