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The harness was fine, replacing the transceiver solved the problem, I'd sure like to get an autopsy report on the one going back.

Thanks Rhino, I have tried different headsets, and I'll try your suggestions. Thanks Again!

On first flight in RV8 with Advanced 6600 panel, the com worked great for 30 minutes. I was able to transmit and receive with groundcrew just fine. About 30 minutes into the flight, I stopped transmitting voice, reception was excellent. Ground crew could hear me key the mike and the radio...

Thanks for the feedback!

Since 16.2.4 was loaded I have a couple of things that no longer work, has anyone tried to load 15.4.7, the older version? I am hesitate to attempt it unless someone else has done it. Dynon says they will have a fix at some point.

Noticed that today. Unusually cold day, but may have flopped a baffle. I’ll check it out. Thanks for noticing.

Note the indicator showing a quartering tailwind! TaDa!!

Now "The rest of the story". I replaced all the push to connect fittings with very robust compression fittings from the dental industry, they are brass and consist of a barb, plastic crush ring and brass nut. Using a hand pump I could not get a vacuum and the system would not hold pressure, I...

Just an update. The switch was indeed upside down, so correcting that improved the performance, but not 100%. I did a static check with a test rig an A&P has that I know and still shown a leak down. I used the push to connect fittings from Cleveland and under pressure could make them leak so I...

I have both in my RV14, all good

Could very well be the Alt Air switch is upside down, will try it in the other position and run both test again.

Today I made a slow speed run on the same course as yesterday, here are the numbers. The indicator did show a tailwind at these speeds (yay!) I also turned on the alt air switch at 6500' cruise speed and the IAS dropped 5 knots, but then settled back to the higher numbers.

That would be above and beyond, but welcomed. I can come your way as well. I have family coming in for the holidays Wednesday but tomorrow, or Sunday Monday would work, or Wed-Thurs next week.

The TAS on the right column came from checkride.com they are pretty close to Dynon’s

Thanks Fish, I have adjusted the setting but it still flips. It is a new install, so I have probably done something wrong, just don't know what it is. One note that it will show a tailwind if I am turning, but as soon as the wings are level, back she goes. Thanks again, CW

I have not recorded any changes in IAS with the amount of tape, I was focused on the indicator and what is was or was not doing. I'll check on the altitude via a ILS, good idea. Attached is a spreadsheet of two runs I did today. Same course, 3000 msl, 30.00", 24.5/2450 on the power settings...

So far the tape has not been the answer, but I am still working with it. Just to note. All other systems are working properly, Autopilot works perfectly, Altitude is with a few feet of GPS altitude and ATC reports my altitude correctly. Here is a clip of the issue. Lower left hand corner, XW...

Fortunately I have a RV4 (with a HDX) so I am not grounded.

I'll have to put this on hold for a couple of weeks, added the tape, during pre-flight I noticed a crack in the spinner back plate. Removed the prop and will have to replace the back plate and (aluminum) spinner. Was not a new spinner/backplate, crack is right in the bend on the back plate. As...

Didn’t get a chance to add the tape, but mothership said to check the Adahrs for a leak, but they think it is a compass issue. I’ll update when I can, may have weather tomorrow. Thanks again!