Garmin G5 Electronic Flight Instrument Part 23 AML STC Maintenance Manual 190-01112-11
Rev. 7
Page 4 of 54
2.1.2 G5 DG/HSI Indicator
The G5 Electronic Flight Instrument configured as a DG/HSI, is shown in Figure 2-2. The G5 is an
electronic instrument display operating as a standalone flight display. It features a bright, sunlight
readable, 3.5-inch color display which is sized to fit in a standard 3-1/8-inch instrument cutout. In this
location the G5’s primary function is the display of slaved compass, VHF NAV and/or GPS NAV,
system #1 or #2. The G5 also contains integrated attitude/air data sensors that provide reversionary
display of attitude and secondary display of air data information. In the event the G5 attitude display
powers down, the G5 DG/HSI will automatically revert to displaying the attitude information.
The G5 DG/HSI configuration is determined at the time of installation as defined by the AML STC
installation data and recorded in APPENDIX A of this document and maintained with the aircraft
records.
Figure 2-2 G5 Electronic Flight Instrument (DG/HSI)
2.1.2.1 G5 Lightning Protection Module (LPM)
The G5 CAN bus inputs require additional and external protection from the effects of lightning. Earlier
installations used discrete components installed in the wiring harness (see Section 6.9.2). Later
installations utilize a modified backshell called a Lightning Protection Module (LPM), this was
introduced to replace the wire harness discrete component installation requirements.
2.1.3 Battery
The G5 has an external lithium-ion battery that provides up to 4 hours of emergency power. The battery
is required for the G5 used as an attitude display, but optional for the G5 used in the DG and HSI
position.
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