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If you don't find an obvious short to ground somewhere, the possibility exists that it is a legitimate alarm from the battery. Attached here is the fault-list for ETX

That indicator is "grounded" to indicate a fault - so if you have a point where the insulation is rubbed through and it is shorting to ground, it will look like an intermittent fault on the panel.

Does the airplane have an EarthX battery in it? That battery has an internal fault indicator with an external wire that can go to the EMS to indicate a problem. That wire normally "floats" as an open wire, but when there is a battery fault the internal battery circuitry ties it to ground - also...

Was that a Dynon-produced cable or owner-built?

There's a reason they make covers for pitot tubes...

Caution with the copper bus bars, make sure they are covered with something during install, or inaccessible from your seat. I ruined a new stainless steel coffee cup one day in my RV by letting it slip under the edge of the instrument panel and short the panel to a bus bar, notched a spot in the...

Sounds like a good place for a decent helping of RTFM.

Since the Rotax 912 has liquid-cooled cylinder heads, your coolant temp is the number you are looking for. I don't know if that value is listed or not, but you could certainly add a thermocouple somewhere in the system and wire it into the EMS.

Are you certain the navigator is switching from GPS mode to VHF mode?

Is the sensor located on the engine or on the firewall? If on the engine itself, you can be seeing the result of a poor engine ground to the airframe - and the heavy starter current is looking for a path to ground through the pressure sensor line.

A skill that, sadly, is largely lost in todays pilots.

I'm not an aerobatic performer - but I would think heading would be a crucial piece for proper performance of certain maneuvers - like maintaining alignment parallel to (and outside of) the crowdline, executing a roll or series of rolls without changing heading etc.

GPS positioning for heading disregards wind direction - which is needed to drive heading versus track, and to show HITS.

You are correct on the georeferenced plate, it will display the plate on the screen and you can hand fly that, or autopilot through the GPS points that you will have to program in, and fly the "step-down" altitudes using the AP vertical descent commands. There will be no VNAV in the...

RTFM (or lack thereof) strikes again.

Make sure the roll servo bridle cable clamps are torqued correctly - the torque specs have been changed from the original documentation. I had "another" shop do the install on mine, and they hosed it up.

So, what exactly do you intend to use to maintain navigational orientation? If you don't intend to actually use the display you are putting in the airplane, then why are you putting it in?

Pull the user data from the Skyview and look at the data in Excel. One of the columns of that data is for Autopilot Disconnect, look for the time/date stamp and that value to go positive - that tells you that the system is seeing the disconnect line being connected to ground. If that was...

Servos unavailable could be a power issue, check power and ground.

Please be very specific here - NO VOLTAGE shown, or it gave you an error saying the voltage didn't change enough to be usable? Two very different scenarios.