AXP340/322 ADS-B Transponder

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AXP340 pirep?

Printed From: Avidyne
Category: Avidyne General
Forum Name: AXP340/322 ADS-B Transponder
Forum Description: Topics on the Avidyne AXP340/322 ADS-B Transponder
URL: https://avidynelive.com/forum_posts.asp?TID=386
Printed Date: 26 Mar 2026 at 2:12pm
Software Version: Web Wiz Forums 12.07 - https://www.webwizforums.com

Topic: AXP340 pirep?

Posted By: paulr
Subject: AXP340 pirep?
Date Posted: 16 Jun 2014 at 4:13am

Does anyone have one of these installed and running? I don't recall seeing any reviews here or in the normal print-media places but I might've missed one...

Replies:

Posted By: Gring
Date Posted: 16 Jun 2014 at 9:14am

I have an AXP340 installed in my aircraft, and it works just fine. I had a Garmin 327 previously and the 340 works just the same from a user perspective - key in the assigned code and you're all set, press the VFR key when done. It has a nice timer function and an altitude alert which is nice.

I had an FAA report of the ADS-b output from my setup IFD540/AXP340, and the report came back all green lights. On another form, it appears that approximately 70% of the Garmin installs noted in the thread failed the FAA test and required further action by the user/avionics installation shop.

Posted By: MikeK
Date Posted: 20 Jun 2014 at 9:43am

Since the 340 isn't a slide-in replacement for the Garmin, I'd be interested to know how the install went. I have the same Garmin and this would be my preferred way to get the ADS-B out requirement dealt with.

Posted By: oskrypuch
Date Posted: 20 Jun 2014 at 10:15am

I speced this out with my shop. They said that it is just a matter of punching down new connections, no need to change harnesses, except perhaps adding a data line between the 540 & 340. I already have one from the 330 install, probably most folks do as well.

So, no need to dismantle the panel, maybe half a day's work, and good trade in value on the 330.

* Orest

Posted By: MikeK
Date Posted: 14 Jul 2014 at 11:48am

Thanks for that info!