Garmin GI 275 major alteration?

[Skyknight320]

Would the Garmin GI 275 when installed in CDI/MFD mode be considered a major alteration requiring a form 337?

 

[Jesse Saint]

Yes.

 

[Skyknight320]

What makes it a major alteration, if something like a Bendix/King KI 209 or Mid-Continent MD200 was installed that would be minor correct?

 

[Skyknight320]

Does the fact that Garmin went through the trouble to get an STC mean it is a major alteration?

 

[Bell206]

Does the fact that Garmin went through the trouble to get an STC mean it is a major alteration?

No. There are several examples in other threads where the vendor included statements in their docs that the work performed under the STC was considered to be a minor alteration to assist the installer with their determination. But regardless what the vendor states, the installer owns the final regulatory determination.

 

[Skyknight320]

It might be an uphill battle if the vendor documentation says it is a major alteration.

 

[455 Bravo Uniform]

Why does it matter? How hard is a 337? What are you trying to accomplish or avoid?

I’m just asking to learn.

 

[Skyknight320]

A 337 requires an IA and a logbook entry only needs an A&P.

 

[Skyknight320]

Also I'm trying to keep the stack of 337's to a minimum

 

[Skyknight320]

and save on postage of sending the 337 to the FAA.

 

[wsuffa]

So you're worried about the cost of an IA signature and postage after paying for the install of the GI 275!?!

 

[Skyknight320]

So you're worried about the cost of an IA signature and postage after paying for the install of the GI 275!?!

I was joking. I just like to keep things simple.

 

[WannFly]

Sign it yourself, even simpler