337 required?

[bradp]

Hi all- quick regulatory question. 

I have a 430 non WAAS as part of an IFR installation that was installed by the previous owner in 2005. 

I bought a used GNS-430W (thank you Chandler Avionics - great to work with them) and plan to slide in the unit in place of the existing 430W. 

The original installation was done with a 337.  I can't find a copy of what the language was so I don't know if it was a field approval or an STC.  I don't think the Garmin STC existed for that navigator at the time so correct me if I'm wrong. 

The replacement of the antenna and cabling was done as separate logbook entries. 

Am I required to use the Garmin STC and go to the trouble of re-verifying all the installation parameters or is this a simple logbook entry as a minor nod that I can do (remove and replace radio stack radios are covered under owner approved maintenance)?   Given the unit had a SW change and a different part number dash I'm wondering what the proper course of action is.  I'd prefer the later of course but will do whatever to keep it legal.  

Im also well aware of just because an STC exists doesn't mean you have to use it (think Rosen visors) if it's a minor mod.  

 

Thanks

 

brad.  

[MIm20c]

I would think especially with the increased capability of lpv approaches you would want one on file. However, I'm not sure what the reg require. 

[takair]

Brad

Did you mean you are sliding it in place of the 430....non W? If you plan on using the LPV capability, you will need the latest supplement.  The supplement is tied to the STC.  The STC is best installed via 337.  My recommendation would be a 337 for the install.  

[Hank]

When I did the WAAS upgrade to my 430 almost ten years ago, it required a new GPS antenna and coax cable.

Sliding one unit out and another one in may not accomplish what you are wanting.

[RLCarter]

Won't you also need to have it all re-certified for IFR?

[kortopates]

Really a conversation for you and your supervising IA that's going to sign off and submit the required 337 which will begin with removing the 430 and installing a 430W. And the first thing he should point out is that he needs a Garmin install manual in order to have the legal basis to install; unless you got a copy of Garmin's installation manual with it or he is a Garmin dealer - since you can't get the doc accept as a Garmin dealer. The install manual will of course detail the changes that@Hank referred to above.


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[Hank]

The fun part was removing the front and back ceiling panels and the long left side panel, as the coax was routed under the windows, a d the puck is behind where my canopy cover stops (makes covering up when I travel so easy!). It's a good time to clean, repair and paint those, too; I used almond SEM paint from the local auto body store.

[goterminal120]

The 430W uses a completely different tray.

[bradp]

Thanks for the re replies.  Fortunately I had anticipated that I might be doing some sort of a WAAS upgrade a few years ago and installed the appropriate antenna and RG-400 cables as per the STC.  So that aspect is completed already in anticipation. I have a copy of the Garmin STC and install manual.  Sounds then like I will have my IA and I verify the install conforms to the STC and submit a new 337.  

Byron, Clarence, DVA and Jclemmons and any of our other maintenance knowledgeable fiends, this sound like the right way to do this?

@goterminal120  the tray and connectors between the GNS 430, GNS 430W and IFD 440 are identical.  The connectors between the 430-lineage and the 530-lineage boxes are the same but the tray dimensions are different. 

[MB65E]

The 430W STC does not exist for the Mooney. It will require a 337. The 530W however has an STC with the Mooney listed in the Type listing. 

Strange!

Eitherway, the supplement is available and should be in the FM.

-Matt 

[takair]

13 minutes ago, MB65E said:

The 430W STC does not exist for the Mooney. It will require a 337. The 530W however has an STC with the Mooney listed in the Type listing. 

Strange!

Eitherway, the supplement is available and should be in the FM.

-Matt 

It's under the AML STC.  It was one of the first AML STCs done.  STC Number:
SA01933LA-D, http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgstc.nsf/0/BFB11C65D9F16B9986257DA2006C6053?OpenDocument

there are variations depending on equipment or type aircraft.

[Guest]

Brad,

If I were importing the airplane I would be looking for the conversion to be listed on a 337, showing the details of the work completed and the specified data used.

Clarence

[MB65E]

1 hour ago, takair said:

It's under the AML STC.  It was one of the first AML STCs done.  STC Number:
SA01933LA-D, http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgstc.nsf/0/BFB11C65D9F16B9986257DA2006C6053?OpenDocument

there are variations depending on equipment or type aircraft.

Well shoot, I rember having major issues! Maybe I had it backwards or it was for non WAAS units. 

The orgional STC of the GNS I remember only one on the AML. 

Thanks for the correction,

-Matt

[takair]

Yes, original STC was for one airframe and required field approval for other model aircraft.

[N6758N]

18 hours ago, goterminal120 said:

The 430W uses a completely different tray.

No it doesn't...