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G1000 / GFC 700 System Maintenance Manual - 300/B300 Series King Air
Revision 1
190-00716-01
2.1.2
GMA 1347D Audio Panel (2)
The Garmin GMA 1347D Audio Panel integrates NAV/COM digital audio, intercom system and marker
beacon controls. The 300/B300 installation includes two GMA 1347D panels. The GMA 1347D panels
provide control of all cockpit intercom/mic systems as well as NAV/COM/ILS audio. The units also
provide display reversion mode control through a large red button. Warning and alert audio received by the
GMA 1347Ds is processed by and received from the GIA 63W Integrated Avionics Units (IAUs). Electrical
power to GMA 1 is provided from No. 1 Triple Fed Bus. Electrical power to GMA 2 is provided from Left
Gen Avionics Bus. GMA 1 will be powered immediately with external or aircraft power or battery
operation. GMA 2 will operate after selecting Avionics Master on. The GMA 1347D units interface with
the existing marker beacon antenna, as well as existing mic and phone jacks and oxygen mask mic.
Figure 2-2, Audio Panel
2.1.3
GMC 710 AFCS Control Unit
The dedicated AFCS controls on the GMC 710 allow crew control interface with the various GFC 700
autopilot / flight director functions. GMC 710 controls are discussed in detail in the G1000/King Air
300/B300 Series Cockpit Reference Guide. The GMC 710 is powered by No. 1 Triple Fed Bus.
Figure 2-3, AFCS Controller
Summary of Contents for Cessna Caravan G1000
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