GTX 345 Code Fault

[29-0363]

I have the GTX345 ADSB In/Out coupled to my G1000, installed about 12 months ago.  

Recently I flew from YPPF to YBTH (Australia ports) for a licence renewal, operating IFR with a discrete transponder code (eg 3456) allocated.  2 days later with my examiner on board, I entered code 1200 using the VFR softkey and we both verified the entry.  We then flew off for the airwork in the local training area and returned.  Later that day we did another session of VFR air work and  I got a call from ATC on area frequency asking  was it me squawking 3456 and  if so,  would I reset to 1200.  I had not verified the code for the second flight, knowing it had been reset to VFR 1200 that morning.

What baffled me was how the G1000/GTX345 could return to the 3456 discrete code uncommanded after  being overwritten by 1200 entered on a previous flight.  That day's earlier flight was in the same area with lots of IFR and VFR traffic around, and there's no way ATC would have not alerted me to an incorrect code.

Anybody out there had a similar experience?

 

 

[carusoam]

0363,

Is your GTX345 panel mounted, with direct input using the buttons on the front?

Not remote, or using input from another device...

Best regards,

-a-

[Danb]

Anthony his is remote like mine.the input is on the G-1000 transponder entry panel, I'm assuming 

[Jeff_S]

There is actually a software update for the GTX345. I got a notice from Garmin. I don't remember that this problem was mentioned in the release notes but my suggestion is to call Garmin Support and get their thoughts. 

[helitim]

On 9/7/2017 at 6:38 AM, Jeff_S said:

There is actually a software update for the GTX345. I got a notice from Garmin. I don't remember that this problem was mentioned in the release notes but my suggestion is to call Garmin Support and get their thoughts. 

Hmmmm, I have a 345R, which I had installed new, and did not receive a notice from Garmin. Will be calling them tomorrow about this. 

Thank you, Tim