DFC90/DFC100 Digital Autopilot - MOD 55 hardware upgrade?

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MOD 55 hardware upgrade?

Printed From: Avidyne
Category: Avidyne General
Forum Name: DFC90/DFC100 Digital Autopilot
Forum Description: Topics on the Avidyne DFC Digital Autopilots
URL: https://avidynelive.com/forum_posts.asp?TID=2666
Printed Date: 26 Mar 2026 at 11:49am
Software Version: Web Wiz Forums 12.07 - https://www.webwizforums.com

Topic: MOD 55 hardware upgrade?

Posted By: _phm_
Subject: MOD 55 hardware upgrade?
Date Posted: 10 Jul 2024 at 4:24am

I saw a video stating that a pre-req for the DFC90 is an Entegra systems with at least version 8.x and a MOD 55 hardware upgrade.

Can someone clarify this? How can I be sure that my system has this mod?

Replies:

Posted By: AviSteve
Date Posted: 10 Jul 2024 at 8:35am

To see if the PFD has MOD 55, you'll have to look for the corresponding mark on the TSO label on the back of the unit. If it does not have MOD55 marked, you'll have to RMA the unit to have the mod applied. The latest software would be installed at the same time.

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Steve Lindsley
Avidyne Engineering