Installing a Garmin G5 to replace GI106

jeffsvan · #1 11-07-2018, 07:02 AM

Team,

I hope I am not repeating a thread, I did a search and could not find.

I am thinking of replacing one of my GI-106 CDI units with a Garmin G5.
The source for this instrument is my GTN650.

Good/bad idea?
How hard will the rewire be?
Should I order the harness Garmin sells with the unit?

comments/ schematics/ info is appreciated.

PS Just paid my yearly $25 donation to VAF. I hope others help to keep this resource as well.

gfb · #2 11-07-2018, 08:04 AM

The GTN will also require the GAD29 unit to convert from ARINC to CAN. Shouldn't be too bad on the wiring, but be prepared to open up your GTN connectors to add some pins.

See page 7-10 of the G5 manual:
http://static.garmin.com/pumac/190-02072-01_03.pdf

Jesse · #3 11-07-2018, 07:34 PM

If you?re just doing one G5, and don?t care about magnetic heading for the G5, it?s an easy wire. 7 wires from the GTN650. 4 arinc wires from the gps connector and 2 arinc wires from the Nav connector. These 6 to the GAD29. 1 serial wire from the gos connector to the G5 directly. A shielded twisted pair from the G5 to the GAD29 for CAN bus. Power & ground to G5 & GAD29. One jumper for CAN termination on the GAD29. You?re done.

jeffsvan · #4 11-28-2018, 07:26 AM

Thank you for your help.

While reading the G5 manual I see it has an internal GPS antenna, but can also accommodate an external antenna.

Will I need to plan for an external antenna install? i.e. is the internal antenna good enough?

gfb · #5 11-28-2018, 07:37 AM

Considering this is the ?oh crap? backup, is it worth saving $50 and a couple of hours of install on the antenna?

airguy · #6 11-28-2018, 08:05 AM

Quote:

Originally Posted by jeffsvan

Thank you for your help.

While reading the G5 manual I see it has an internal GPS antenna, but can also accommodate an external antenna.

Will I need to plan for an external antenna install? i.e. is the internal antenna good enough?

Use the external. In my 9A the G5 will take 15 minutes or so to grab the GPS lock from just the internal antenna, and will lose it with significant maneuvering. I have purchased an external antenna and will install it during my annual in February.

Tooch · #7 11-29-2018, 04:53 AM

Just wondering. If the GTN650 is connected to the G5, won't it get gps info from the 650? so not needing it's own external antenna?

Jesse · #8 11-29-2018, 07:09 AM

Quote:

Originally Posted by Tooch

Just wondering. If the GTN650 is connected to the G5, won't it get gps info from the 650? so not needing it's own external antenna?

If it's connected to a WAAS GPS, it does not need its own antenna.

g3xpert · #9 11-29-2018, 08:38 AM

Quote:

Originally Posted by Tooch

Just wondering. If the GTN650 is connected to the G5, won't it get gps info from the 650? so not needing it's own external antenna?

Hello Tooch,

Yes, that is correct that if a GTN/GNS is providing MapMX to the RS-232 port on the G5, it does not specifically require a separate external antenna. You would want to disable the G5 internal GPS in this case.

An Aera 660 has a WAAS GPS, but having this connected to the G5 does not provide sufficient data for attitude sensor aiding.

Thanks,
Steve

olyolson · #10 12-07-2018, 11:54 AM

Steve,

Taking it one step further, can a GTN 650 or an SL-30 provide any approach data to the G5 as a backup? I have a GTN 650, and SL-30 and an AFS 5500 touchscreen with the Skyview network and Dynon autopilot servos. The autopilot is controlled from within the AFS EFIS. Since I don't have the Garmin autopilot controller or the Garmin servos I know there won't be any flight director type guidance.

The GTN 650 feeds my AFS screen for Nav, ILS/VOR and RNAV approaches but I would like to get rid of the round dial A/S, Gemini PFD and the Altimeter to install a Garmin G5. I understand that the Dynon D-10A can act like a GI-106 Indicator but wasn't sure the G5 could.