GI 275 Sync Update

[jlunseth]

I have a GTN 750 Xi, two GI275’s (redundant configuration) and a Garmin data subscription. When I first got all this I could do a Sync update in the Garmin Aviation Database Manager and the 275s would seamlessly update from the GTN. Then there was a software update, I think to the GTN, and it is no longer seamless. I remember reading a topic where this was discussed but at the time there was no good solution. Hoping there is by now.

So I still do the Sync update. The GTN populates and shows database mismatches with the two GI275s. I have tried everything I can think of to force the 275s to update, but short of putting the updates on a USB or similar it is not happening. They show up in the 275s as Standby databases, I have tried the Activate Standby button and nothing happens.

All is not lost. For better or worse, on the next start up the 275s are magically using the current, apparently synced, database. Taking the hint, I have tried cycling the Radio Master off and on but that does not prompt the 275s to update. I frankly cannot remember if I have tried cycling the Master, maybe that will do it. That might do it, I believe the 275s are wired to the Master and not the Radio Master (the GTN is wired to the Radio Master).

But it does not seem logical that something that once worked does no longer, and that I can’t even manually cause it to work using the menu buttons in the 275s.

It is a pain going out to the airport, usually on a schedule to pick up someone, putting the cards in, waiting for the GTN to update, and then having to shut down and restart just to get the 275s updated. Frankly, I don’t know what the point of updating their databases even is, they are not the guidance source, the GTN is.

Any useful thoughts or solutions?

[Utah20Gflyer]

I’ve been having issues with my GI 275 updates as well.  I might try to take my plane into the avionics shop next week to address a separate issue and will see if they have any resolution to the issue.  

[PeteMc]

There are various reasons you can get the Mismatch DB.  Mine was because when it came out of the shop the Standby and Current DBs were not the same in all my units.  Garmin told me to use a USB Drive to do the next update to my GI275 to see if it would resolve the issue.  So rather than just do the USB update for the GI275, I also made specific SD Cards for my GTN and GNC (not a Sync update) and that seemed to fix it.      

 

[jlunseth]

I am getting the mismatch because the new, synced databases are loading into the 275s, but not activating as the primary database. In other words, they are just sitting in the unit as a standby and the old, expired database is still the active database. Can’t get the unit to activate, at least not without shutting down and restarting. As we discuss this, that might be my solution. The 275s are wired to the Master. They do update the next time I start the engine. So maybe what I need to do is cycle the Master after the GTN has updated itself and sent the new db’s over to the 275s. That will reboot the 275s and may solve the problem. I am going to try that the next time I fly.

PS I’ll bet that is the problem. My 275s are certified primary for the AI and HSI (and a few other things). To do that they are probably inhibited from rebooting after they are switched on, to prevent a reboot in the air, say, when you are using them to navigate in the clag.

[201Mooniac]

I think you are probably correct in the primary units don't reboot.  I have a standby ADI and an EIS and the standby ADI reboots and loads the databases right after sync (when the GTN asks to restart for load) but the EIS does not (I don't even really know why the EIS needs the nav db).

[PprophetBirdman]

Same issue here. GTN 750Xi plus a GI 275 backup ADI and another for an EIS.
What I have done is to enable the WiFi on the EIS and the databases update on the GI 275 simultaneously and sync with each other. The DB mismatch msg persists on the GTN, but the DBs are all the same.


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