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  #1  
Old 06-03-2019, 11:10 AM
Jrskygod Jrskygod is offline
 
Join Date: Dec 2011
Location: Edinburg, TX
Posts: 639
Default Heads up Dynon Skyview users

As I am sure some of you Dynon Skyview users with antennas manufactured prior to 2012 have found out there will possibly be problem with your autopilot functioning properly.

This came to my attention a few weeks ago when making some approaches fully coupled and navigation being supplied from my Avidyne 440. From the FAF inbound the autopilot steered to the left and as I was VMC I just observed and it was off by two dots by the time I got to the MAP. I was able to duplicate the same behavior at two other airports. Enroute it worked just fine with no issues.

After consulting with Dynon I was informed that the GPS antennas manufactured prior to 2012 had a chip that was affected by the satellite date issue that took place in April. Dynon sent me a software patch and after loading it into the system all is well. Apparently the Skyview system uses its own antenna system for navigation as well that provided by the certified navigator and when there is a discrepancy strange things can happen without a warning prompt.

If you are flying IFR approaches with a Dynon antenna manufactured prior to 2012 you might get the patch before you have an issue and spend a bunch of time trying to figure out if you have a navigator or autopilot problem.

Also this same issue affected my D1 backup mini EFIS and I had to upgrade that antenna as well.
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  #2  
Old 06-03-2019, 03:34 PM
Pdtofly Pdtofly is offline
 
Join Date: Jan 2012
Location: Reno, NV
Posts: 492
Default Dynon Firmware 15.3.5 and 15.4.4

The SkyView firmware 15.3.5 fixed the GPS 250 date/time bug issue for the original GPS 250 with the old chip.

In firmware update 15.4.4, there is also a update to the GPS 2020 Receiver. The update is to fix a bug in the reported NACv value over to the transponder for ADS-B out. The GPS-2020 was previously sending an incorrect value which caused some of the FAA ADS-B report (PAPR) to flag it in yellow. You will need to update the GPS 2020 Receiver if you have anything less that version 1.11 on the receiver.

If anyone who has a copy of 15.4.4 and want to know how to update the GPS 2020 within SkyView, email me and I will send you the direction that I wrote up after I figured how to do it. This is how to update the GPS 2020 receiver only which fixes a glitch with the ADSB report, and has nothing to do with the time problems with the GPS 250. The GPS 250 is just needs a bug fix that was fixed in 15.3.5 and higher. My directions also tell you how to check the GPS 2020 version number. There is a bunch of pictures in it, so at this point in time, it will just be easier to email my directions.

Send the request to hr2plt@yahoo.com and I will send it to you.

Brian
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  #3  
Old 06-03-2019, 04:08 PM
Pdtofly Pdtofly is offline
 
Join Date: Jan 2012
Location: Reno, NV
Posts: 492
Default How to tell if you need to update the Dynon GPS 2020

You can find the version number of your Dynon GPS 2020 by going to the serial port 5 setup, SETUP MENU> SYSTEM SETUP> SERIAL PORT 5 SETUP>NAVIGATION DATA. Click on Navigation Data to open the file and check the version number. It is almost all the way at the bottom. The example below show Version 1.08.



You will need to update it to version 1.11, which is the current version in new GPS 2020's being shipped.

This is only for GPS 2020. GPS 250 does not have a version number.

I will post how to update the firmware to the GPS 2020 within the next few days if anyone is interested.

Brian

Last edited by Pdtofly : 06-03-2019 at 04:15 PM.
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  #4  
Old 06-03-2019, 05:41 PM
WingsOnWheels WingsOnWheels is offline
 
Join Date: Mar 2009
Location: Plano, TX
Posts: 2,137
Default

On my black box data file, i am showing no GPS date/time. Also, my system time is off by about 10 minutes. Is this the same issue? I have a GPS 250.
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  #5  
Old 06-03-2019, 08:57 PM
Pdtofly Pdtofly is offline
 
Join Date: Jan 2012
Location: Reno, NV
Posts: 492
Default GPS 250 Date/Time fix

Yes, that is the main problem with the earlier GPS 250 receivers. You lost the date and time last month. SkyView firmware 15.3.5 will fix the GPS 250 date/time problem by just updating the SkyView firmware. 15.4.4 will also fix it, but Dynon has not finished the manuals for 15.4.4 yet, which one of the reason they have not released it yet. I think they were waiting to test the SkyView with the new GPS 175/GNX 375 so they can add that info and settings in the new install manual.

In 15.4.4, there is also an update to the GPS 2020 receiver firmware, see my previous posts above, but it does not update the GPS 250 firmware. It fixes the GPS 250 with a bug fix in the SkyView firmware only.

So download and install 15.3.5 from the Dynon's website, or if you want to install 15.4.4, you can use the above link in the second post, but remember there is no install manual and pilot's guide for 15.4.4 yet. Within the next few days after I get home, I will post how to update the GPS 2020 receiver to the new firmware version 1.11 for those who need to, so check back around Thursday for my updated post.

Brian

Last edited by Pdtofly : 06-03-2019 at 09:03 PM.
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  #6  
Old 06-04-2019, 06:14 AM
Raymo's Avatar
Raymo Raymo is offline
 
Join Date: Nov 2014
Location: Richmond Hill, GA (KLHW)
Posts: 2,319
Default

Quote:
Originally Posted by Jrskygod View Post
If you are flying IFR approaches with a Dynon antenna manufactured prior to 2012 you might get the patch before you have an issue and spend a bunch of time trying to figure out if you have a navigator or autopilot problem.

Also this same issue affected my D1 backup mini EFIS and I had to upgrade that antenna as well.
This was covered on the Dynon forum, which is down until they replace it with the new system but the above statement doesn't sound right. The Dynon GPS250 cannot be used on an IFR approach. I'd suspect something was not properly configured with respect to the GPS source.
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  #7  
Old 06-05-2019, 06:25 AM
WingsOnWheels WingsOnWheels is offline
 
Join Date: Mar 2009
Location: Plano, TX
Posts: 2,137
Default

I must have just missed that update. I updated my skyview just a few weeks ago. I made the mistake of doing it right before first flight. The update wiped out some of my EMS sensor mapping, so I had to spend the morning redoing my mapping and ranges, I was not happy.
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  #8  
Old 06-05-2019, 11:27 AM
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Pilot135pd Pilot135pd is offline
 
Join Date: Jan 2019
Location: Vaca Moo Airport - TA37 in East TEXAS
Posts: 1,410
Default

Is this date/time issue for the Skyview only or would it affect the D-180 also?
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  #9  
Old 06-05-2019, 02:40 PM
Bicyclops Bicyclops is offline
 
Join Date: Oct 2012
Location: LA, California
Posts: 364
Default AFS?

Hmmm..... Is there a firmware update for AFS users of the GPS250 and 2020 units? I have one of each.

Ed Holyoke
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  #10  
Old 06-05-2019, 03:11 PM
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RV7A Flyer RV7A Flyer is offline
 
Join Date: Jul 2013
Location: US
Posts: 2,403
Default

Quote:
Originally Posted by Raymo View Post
This was covered on the Dynon forum, which is down until they replace it with the new system but the above statement doesn't sound right. The Dynon GPS250 cannot be used on an IFR approach. I'd suspect something was not properly configured with respect to the GPS source.
In fact, at least speaking of the "uncertified" world of RVs and Dynons, you can't use a Dynon Skyview as the primary instrument for an approach, regardless of antenna. It's not a "certified navigator"...you'll need a 430/530 or 650/whatever or the like.
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