IFR

[rogersmart]

In researching requirements for IFR certification for my RV-8 using the Skyview product, I ran across the following statement in an EAA document.

"The requirements for altitude reporting equipment associated with the transponder are called out in 91.217(c), which states that, the altimeters and digitizers must meet the standards of TSO-C10b and TSO-C88, respectively. TSO-C10b applies to the sensitive altimeter itself, and TSO-C88 applies to the automatic altitude reporting equipment."

I also found a post where Dynon support wrote this about the previous generation product.

Started by Bill Denton | Post by Dynon Support
The D180 is an altimeter, ASI, artificial horizon, turn coordinator, compass, directional gyro, altitude encoder, EGT gauge, CHT gauge, tachometer, manifold pressure gauge, clock, fuel level gauge, and a whole bunch of other things all in one box. I'm sure we meet some TSO in there somewhere

Basically, we designed the EFIS and EMS while looking at the major TSO requirements, and we expect that they would meet them, but we make no guarantees about this.  

I am making the assumption that the Skyview product will not be TSOed and that a seperate TSOed Altimeter and Encoder will be required to certify for IFR flight.  Am I correct?

Also how about the requirements for Atitude, Skip/Skid and Turn Rate?  I am making the assumption the Dynon will meet this requirements since I see no TSO requirement for these functions.

Thanks in advance...

 

[dynonsupport]

There's been debate on this point in the past (search for "TSO" to pull up the past discussion.) We can say that almost no one that uses our products gets denied IFR certs by their shops/DARs/etc, but it has happened on rare occasion. Also, we do believe that the regulation is written in such a way that allows an alternate method of compliance, which we are capable of meeting. Here's the full regulation:

-----
Sec. 91.217 - Data correspondence between automatically reported pressure altitude data and the pilot's altitude reference.

No person may operate any automatic pressure altitude reporting equipment associated with a radar beacon transponder --

(a) When deactivation of that equipment is directed by ATC;

(b) Unless, as installed, that equipment was tested and calibrated to transmit altitude data corresponding within 125 feet (on a 95 percent probability basis) of the indicated or calibrated datum of the altimeter normally used to maintain flight altitude, with that altimeter referenced to 29.92 inches of mercury for altitudes from sea level to the maximum operating altitude of the aircraft; or

(c) Unless the altimeters and digitizers in that equipment meet the standards of TSO-C10b and TSO-C88, respectively.
-----

Our reading is that if you comply with (b), you need not meet (c) since the regulation is written (b) OR (c).

 

[rogersmart]

A year later and I am putting the finishing touches on an RV8 with Skyview 10”. Still looking at the same question I had last year, please read post above. In light of the transponder SV-XPNDR-26X being introduced, what is Dynon’s position as to using Skyview as an encoder and the encoder certification.

Your description of the transponder states it is certified and meets certain TSOs and is approved fro IFR and VFR flight. Doesn’t the encoder also require a certification since it is a part of the altitude reporting system? If so where is this encoder certification shown?

Thanks

 

[ColoCardinal]

Dynon states that the full ADS-B Out compliance requires a TSO-C146A GPS (WAAS) to be connected to the Mode S transponder. Also, the ARINC module product summary states "The SkyView SV-ARINC-429 Module delivers on the promise to make SkyView compatible with certified GPS receivers, integrating with radios such as the Garmin 430/530."

 

[dynonsupport]

The transponder module itself is actually TSO'd. SkyView - the altitude provider - is not, but our position remains that it need not be per the above.

 

[johnsteichen]

My sky view just passed it's pitot static ifr check
I have a garmin transponder and I used the gray code converter module to feed info from sky view. no adjustment needed
sky view and my Mechanical altimeter were perfectly in sync with no adjustments