IFD 5 Series & IFD 4 Series Touch Screen GPS/NAV/COM

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IFD vor 28 degree error

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: http://forums.avidyne.com/forum_posts.asp?TID=2211
Printed Date: 05 May 2024 at 6:55pm
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com

Topic: IFD vor 28 degree error

Posted By: piper18O
Subject: IFD vor 28 degree error
Date Posted: 20 Jun 2021 at 10:53pm

I realized today that I have not done a vor check on my Avidyne 440 since I received a replacement unit over a year ago after a warranty claim. I have exclusively used gps only for navigation without any errors since I got the unit. Today I did a vor check and discovered I have a 28 degree error in vor vloc mode. My vor head is an MD200-706 CDI. That is a ridiculously high error. Does anyone have an explanation for this, and how difficult is the fix? Just fyi, my #2 radio, a 45 year old kx170 was spot on when I checked it.

Replies:

Posted By: eallevato
Date Posted: 21 Jun 2021 at 1:01am

You have to go into the 440 configuration mode and calibrate the MD-200 to the 440. You set the OBS on the MD-200 to 150 degrees and then press “Calibrate to 150 degrees” on the 440 menu.

Gene

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Gene

Posted By: Gring
Date Posted: 21 Jun 2021 at 7:19am

it sounds like the shop that did the swap did not follow the post installation checklist / checkout procedures. Not only do you want to “zero out” the VOR indicator as mentioned above, you want to rotate it and check it every 30 degrees. You may find a small error at some compass headings.