IFD 5 Series & IFD 4 Series Touch Screen GPS/NAV/COM - Dual IFD database update requirements

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Dual IFD database update requirements

Printed From: Avidyne
Category: Avidyne General
Forum Name: IFD 5 Series & IFD 4 Series Touch Screen GPS/NAV/COM
Forum Description: Topics on Avidyne's IFD 5 Series and IFD 4 Series Touch Screen GPS/NAV/COM
URL: https://avidynelive.com/forum_posts.asp?TID=2100
Printed Date: 26 Mar 2026 at 9:29pm
Software Version: Web Wiz Forums 12.07 - https://www.webwizforums.com

Topic: Dual IFD database update requirements

Posted By: Rallylancer122
Subject: Dual IFD database update requirements
Date Posted: 21 Oct 2020 at 4:55pm

Hi Guys,

I recently bought a plane with an IFD 540/440 combo. Do I need to actually do database updates on both units, or can I just keep one current and not use the other for navigation that requires a current database?

I realize this is a cheapskate question....but turns out I'm a cheapskate! (Actually the combo is way more capability than I need. I never use the 440.)

Replies:

Posted By: oskrypuch
Date Posted: 21 Oct 2020 at 5:53pm

Well, in the very least, I think that the flightplans will not synchronize if the databases don't match.

* Orest

Posted By: rpostmo
Date Posted: 22 Oct 2020 at 3:46am

If you're using the IFD100, that database must match the IFD 540/440 database.

Thus if you want the IFD100 to be able to be used with both, they must both be updated.

If you just want to use the 440 as backup, you don't need to update the DB, but then you

either need to leave your IFD100 with the old 440-matching database, or update it and

use it only with the 540.