Page 2-4 G1000 / GFC 700 System Maintenance Manual - 300/B300 Series King Air
Revision 1 190-00716-01
2.1.6 GIA 63W Integrated Avionics Unit (2)
Two Garmin GIA 63W Integrated Avionics Units (IAUs) contain the VHF COM/NAV receivers, WAAS
GPS receiver, Flight Director, and system integration microprocessors. The GIAs also serve as a
communication interface to all other G1000 LRUs in the system. Each GIA 63W communicates directly
with the on-side GDU 1040A display using a HSDB Ethernet connection. Both GIAs are located remotely
in the nose equipment bay.
GIA 1 receives primary electrical power from No. 1 Triple Fed Bus and a secondary electrical power supply
from Center Bus. GIA 2 receives electrical power from No. 3 Triple Fed Bus. The GIA 1’s COMM power
supply (COMM 1) is provided by No. 1 Triple Fed Bus. GIA 2’s COMM power supply (COMM 2) is
provided by Left Gen Avionics Bus. Therefore, both GIAs power-up immediately with external or aircraft
power or battery operation, with the exception of COMM 2 operation which will become active after
selection of Avionics Master on.
Both GIA 63Ws interface to the following equipment:
• Existing VOR/LOC/Glideslope Antenna System
• Existing VHF COM #1 & #2 Antennas
• Newly installed GA 36 and GA 37 GPS/WAAS Antennas
• GMA 1347D, #1 & #2
• GEA 71, #1 & #2
• GDU 1040A, #1 & #2
• GSA 80
• GSA 9000
• GRS 77, #1 & #2
• Traffic System (if installed)
The GIA 63W #1 interfaces to the following additional equipment:
• GDC 7400 #1
• GTX 33( ) #1
• DME 42 (if installed)
The GIA 63W #2 interfaces to the following additional equipment:
• GDC 7400 #2
• GTX 33 ( ) #2
• ADF (if installed)
• Stormscope (if installed)
• Radio Altimeter (if installed)
Figure 2-6, GIA unit
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