Avionics Certification Question

[NotarPilot]

Being that there are smarter people than me on here, does anyone know how the certification process works to build an AML for a particular piece of equipment? For example: The AML for the Dynon Skyview HDX includes over 600 different airframes and some of them are pretty obscure aircraft such as the Howard Aircraft DGA-11, Mooney M22, Nardi FN-333 (All of 29 ever made), PZL M26 (9 made), etc. Does this mean they installed and tested a Dynon Skyview in each airframe or do they determine that two airframes are similar enough to sign-off on an approval for multiple different airframes? 

Same with the Garmin GFC 500. There are currently 28 different models of airplanes with numerous subvariants. I’m guessing not all the subvariants are tested for each model. 

Does anyone have any insight on the certification process? I’m very curious.

[carusoam]

There are probably different levels of work that needs to be completed for the FAA to sign off on various STCs…

For the GFC500 AP… Garmin was enlisting MSers to support the project with their planes…

One of every model was actually being used for a few weeks…

An AP is more complex than a single radio…. Some of that complexity was mounting brackets for each model, wire runs, and chain drives….

 

So… the answer is… it probably depends…

But, the STC writer will have that conversation of requirements with the FAA as the project gets started…

a great question to ask if you have a Howard Aircraft and aren’t sure about an STC you are purchasing… 
 

The installation information probably has the serial numbers of the planes used to write the STC and AML…

 

PP thoughts only, there is a lot of similarity with the big Gov three letter organizations…

It may be wise to ask your favorite Dynon guy… if this question is related to Dynon…

Best regards,

-a-

[NotarPilot]

29 minutes ago, carusoam said:

There are probably different levels of work that needs to be completed for the FAA to sign off on various STCs…

For the GFC500 AP… Garmin was enlisting MSers to support the project with their planes…

One of every model was actually being used for a few weeks…

An AP is more complex than a single radio…. Some of that complexity was mounting brackets for each model, wire runs, and chain drives….

 

So… the answer is… it probably depends…

But, the STC writer will have that conversation of requirements with the FAA as the project gets started…

a great question to ask if you have a Howard Aircraft and aren’t sure about an STC you are purchasing… 
 

The installation information probably has the serial numbers of the planes used to write the STC and AML…

 

PP thoughts only, there is a lot of similarity with the big Gov three letter organizations…

It may be wise to ask your favorite Dynon guy… if this question is related to Dynon…

Best regards,

-a-

This question was more out of curiosity more than anything. I was looking at the AML and some of the aircraft I don’t even recognize. I had to Google the Howard DGA-11 and the Nardi FN-333. I knew Nardi was an Italian manufacturer that once made Hughes model helicopters under license in the 70s and 80s but that’s it. 
 

I can’t imagine there’s a old Hughes biplane flying around somewhere with a Dynon Skyview in it but then again, I could be wrong. 

[Yetti]

It's the STC process first.  Then the AML.

I think Dynon did the 172 STC and then all the other models on the AML.   The STC process is paperwork with the FAA.   You can read about it on the FAA website.

 

[NotarPilot]

On 10/26/2022 at 1:17 PM, Yetti said:

It's the STC process first.  Then the AML.

I think Dynon did the 172 STC and then all the other models on the AML.   The STC process is paperwork with the FAA.   You can read about it on the FAA website.

 

I was hoping for a shorter answer than reading something on the FAA website.