VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

  #1  
Old 09-24-2019, 07:41 AM
Ted Christopher Ted Christopher is offline
 
Join Date: May 2016
Location: Braham, MN
Posts: 29
Angry Skyview Losing Instruments/EMS

The Skyview system that came with my RV12 SLSA had to be replaced under warranty and Dynon sent me a rebuilt unit early in 2017. Since then I've seen periodic "Standby System Failure" messages and more rarely, screen failures where the EMS or flight instruments screens drop out. Each time that happens I've been in touch with Dynon and they say "probably a wiring fault" but I've had an avionics tech check wiring on two occasions now. (We did not check the roll servo connections and AHDRS connections and will schedule that next.)

So, I've sent the Skyview unit in twice this summer, once to have the software updated when it locked up on my software update, once to have it checked when that new software failed to detect and update the other components. Last time the screen went haywire I landed and downloaded diagnostic files, but my Dynon tech rep says they only prove the problems occurred, without saying why.

Advice would be appreciated. I only trust the plane for local flights now since I've had to land without instruments.
Reply With Quote
  #2  
Old 09-24-2019, 08:19 AM
Pdtofly Pdtofly is offline
 
Join Date: Jan 2012
Location: Reno, NV
Posts: 259
Default Try this

Ted,

If the SkyView screen was checked out by Dynon, you need to look at something else in the system. Where Dynon says check out the wiring, you can do a simple check. Since both the ADHARS and EMS module are the ones showing faults, check the Network Status when the fault happens. Any other units like the servos on the SkyView bus could be at fault like a short on the Power or Data Wires, which are the Green, Blue, the White/Green, and White/Blue wires. The power ones could also be shorted, which are the Red, Black, White/Red, and the White/Black. With a short on anyone of those wires, and since they are all common to all the other units, it will cause a loss of valid signals from the ADHARS and EMS. You can start removing each component from the system and start adding them back until the the system fails. Also you might need to use a new set of SkyView bus cables as the problem could be in one of the connectors or the hub.

To check on SkyView network status, enter the NETWORK STATUS… Menu in the Network Setup Menu (SETUP MENU > SYSTEM SETUP > SKYVIEW NETWORK SETUP > NETWORK STATUS…).

Look for any line in Yellow or Red. If it is in Yellow, and if there is a open or short in the data lines, it will tell you below the Yellow line.

If you have any more questions, you can PM me and we can talk more.

Brian

Last edited by Pdtofly : 09-24-2019 at 08:23 AM.
Reply With Quote
  #3  
Old 09-24-2019, 10:11 AM
Top Cat Top Cat is offline
 
Join Date: May 2014
Location: Fort Mill SC
Posts: 333
Default

I too had numerous problems and failures with the SkyView that came with my new SLSA 2014 model.

After several unit returns to Dynon and hours on the phone with their tech support I was eventually swapped out with a like new refurbished unit

Don’t know if I, or the other SLSAs, received lemon units but the refurbished replacement unit has worked really since I installed it

Last edited by Top Cat : 09-24-2019 at 03:48 PM.
Reply With Quote
  #4  
Old 09-24-2019, 05:10 PM
Ted Christopher Ted Christopher is offline
 
Join Date: May 2016
Location: Braham, MN
Posts: 29
Default Just so intermittent

Thank you both for your comments. Part of the challenge is the screen works fine for extended periods, then suddenly fails. If it's a broken wire or short wouldn't the failure continue? My last 40 minute flight there were no issues, the previous 90 minute flight I had multiple times when the EMS and instruments were Xed out.
Reply With Quote
  #5  
Old 09-24-2019, 06:53 PM
maus92 maus92 is offline
 
Join Date: Nov 2013
Location: Annapolis MD
Posts: 446
Default

Quote:
Originally Posted by Ted Christopher View Post
Thank you both for your comments. Part of the challenge is the screen works fine for extended periods, then suddenly fails. If it's a broken wire or short wouldn't the failure continue? My last 40 minute flight there were no issues, the previous 90 minute flight I had multiple times when the EMS and instruments were Xed out.
I would start by inspecting connectors for loose wires / badly crimped / unseated pins. And shorts can be intermittent.

Can you relate the failures to temperatures?
__________________
CA
2000 RV-8A | O-360, SDS CPI, FP, G3X Touch, VP-X, EarthX | Eastern Shore | KESN
Reply With Quote
  #6  
Old 09-24-2019, 07:23 PM
noelf noelf is offline
 
Join Date: Nov 2007
Location: Cary, N.C.
Posts: 1,149
Default

I have limited experience with Dynon's SkyView, but have you mapped out the SV Net connections to all the connected devices? Are the failures associated with one particular leg of the SV Net wiring, or are the failures on the end of one long connected net? This is just a place to start looking and isolating the failures.
__________________
Noel
RV-6A N6NF
tip-up
flying
Reply With Quote
  #7  
Old 09-25-2019, 06:54 AM
jakej jakej is offline
 
Join Date: Aug 2005
Location: Adelaide, Australia
Posts: 113
Default

Ted, FWIW I’d remove the backs shells from the network 9 pin connectors & physically give each wire a gentle pull to check if the sockets are ‘locked in’ -anyone using a DMM to just testing wiring continuity can only find a broken wire or maybe shorting, a gentle pull will confirm that the socket (pin) is actually making contact - just saying
Reply With Quote
  #8  
Old 09-25-2019, 07:22 AM
Don Jones's Avatar
Don Jones Don Jones is offline
 
Join Date: Nov 2005
Location: Snohomish, Washington
Posts: 685
Default

Ted,
This is going to be quite complicated to run down and would like to discuss it with you on the phone due to this. Give me a call 425-402-0433, if I am not available, leave a message and I will get back to you asap.
__________________
Don Jones
Technical Support Manager
Dynon Avionics
CFI-IA, AGI, IGI
RV9-A

Last edited by Don Jones : 10-10-2019 at 02:12 PM.
Reply With Quote
  #9  
Old 10-09-2019, 10:15 AM
Ted Christopher Ted Christopher is offline
 
Join Date: May 2016
Location: Braham, MN
Posts: 29
Default So it was the screen all along.

Just a note that Don's number got transposed in his message, it should start with 425.

My Skyview screen is back at Dynon, I'm hoping "third time's the charm" as this will be the third time it has gone in this year. As a buyer of an SLSA with limited avionics troubleshooting ability, I paid an avionics tech to work with me to check all the wiring connections: no shorts and no breaks to any of the components.

Then we called Dynon and technician to technician, they were able to confirm the Skyview itself was failing: one clue, it would not detect any of the components using the top 9 pin connector, and continued to say "Data pair 1 and 6 fault" on the bottom. Dynon is planning to replace the communications chip and possibly other components so I have a reliable plane again.
Reply With Quote
  #10  
Old 10-10-2019, 02:16 PM
Don Jones's Avatar
Don Jones Don Jones is offline
 
Join Date: Nov 2005
Location: Snohomish, Washington
Posts: 685
Default

Ted, Glad we finally got to the bottom of the issue. Things like this are often very difficult to find in the field. I fixed the phone number in my post.
__________________
Don Jones
Technical Support Manager
Dynon Avionics
CFI-IA, AGI, IGI
RV9-A
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 05:24 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.