EX-Series Multi-Function Displays

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STC SA00161BO

Printed From: Avidyne
Category: Avidyne General
Forum Name: EX-Series Multi-Function Displays
Forum Description: Topics related to the Avidyne EX500, EX600, and EX5000 Multi-Function Displays (MFDs)
URL: https://avidynelive.com/forum_posts.asp?TID=785
Printed Date: 26 Mar 2026 at 1:01pm
Software Version: Web Wiz Forums 12.07 - https://www.webwizforums.com

Topic: STC SA00161BO

Posted By: Cristhian
Subject: STC SA00161BO
Date Posted: 13 Aug 2015 at 10:46am

Hi, i need to legalize an EX500 installed on a PA-34-200T many years ago without a 337, according to the STC i need the AVMFD-079 and AVMFD-303 documents; i request this documents to Avidyne with no results, any of you can help me with this documents?
Looking for the correct installation of this equipment the only heading source that i can see in this aircraft its a KI-25A, is this a valid heading source?

Replies:

Posted By: DavidBunin
Date Posted: 13 Aug 2015 at 11:00am

I do not know about those documents, but the "KI-25A" is probably a KI-525A which is the indicator for a KCS-55A compass system. The KCS-55 was the standard of the industry for many, many years so I suspect it will be a valid heading source for any kind of equipment.

Posted By: Cristhian
Date Posted: 13 Aug 2015 at 11:37am

My bad, a KI-525A.