Lost True Airspeed and Winds

[carterd]

SV D1000, SV D700, SV GPS.

Cruise Climbed to 7500. I had true airspeed and winds indicated on the 1000 and 700. During cross check the true airspeed abd winds indication were no longer available. Ground speed an HSI were workking and the GPS appeared to be OK.

What should I do to trouble shoot this problem?

 

[Dynon]

When you say cross-check, what do you mean? If you're in the ADAHRS COMPARE menu, many non-essential items are decluttered so that you can best compare the core flight instrumentation that the ADAHRS provides.

If you're saying that TAS was gone in the normal PFD presentation when it had previously been there, it's mostly likely that your OAT prove is inoperative or disconnected. If the OAT's not working, you'll see dashes in the OAT info area in the lower right corner of the PFD display.

 

[carterd]

It was a visual cross check. The winds and true airspeedseemed to go out at the same time. Thats confusing. I did not see dashes. They could have been there. I am loading the 12 software tomorrow and will recheck the displays. TAS and winds going out together is confusing. Are they connected in ant way?

 

[dynonsupport]

TAS is IAS + OAT.
Winds are TAS+Magnetometer+GPS

So if you lose OAT, you lose TAS, and losing TAS means you lose winds.

Chances are your real issue is you have a bad OAT connection, but aren't noticing that you are losing OAT at the times your other data goes away. Keep an eye on this.