System Maintenance Manual

G1000/GFC700 System Maintenance Manual – C90A/C90GT/C90GTi King Air Page 2-3
190-00682-01 Revision F
2.1.5 GIA 63W Integrated Avionics Unit (2)
Two Garmin GIA 63W Integrated Avionics Units (IAUs) contains 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.
Power is provided to both GIAs by the triple-fed bus. The triple-fed bus is powered by the battery and both
generator buses. Additionally, a secondary power source is provided to GIA1 by the center bus, which is fed
by both generator buses and the battery. The GIA 1’s COMM power supply (COM 1) is provided by No.1
Avionics Bus. GIA 2’s COMM power supply (COM 2) is provided by No.2 Avionics Bus. Therefore,
both GIAs power-up immediately with external or aircraft power or battery operation, with the exception of
both COMs, which will become active after selection of Avionics Master on. Both GIA 63s interface to the
following equipment:
• Existing VOR/LOC/Glideslope Antenna System
• Existing VHF COM #1 & #2 Antennas
• GPS/WAAS Antennas
• GMA 1347D, #1 & #2
• GEA 71, #1 & #2
• GDU 1040A, #1 & #2
• GSA 80 (all) and GSA 81
• GRS 77, #1 & #2
• Traffic System (if installed)
The GIA 63W #1 interfaces to the following additional equipment:
• GDC 74B #1
• GTX 33 #1
• DME 42 (if installed)
The GIA 63W #2 interfaces to the following additional equipment:
• GDC 74B #2
• GTX 33 #2
• ADF 60 (if installed)
• Stormscope (if installed)