The KT-76A finally went tango uniform so I'm getting a Garmin GTX-320A with
the adapter for the King transponder. Actually, the KT-76A still works but
it takes 45 minutes to an hour for it to warm up so it's equivalent to dead.

Has anyone out there gone the slide-in replacement route on the Garmin? How
was the experience and did you have to get a new antenna (I have the
pole-type)? Lastly, was it a logbook entry or did you have to get an
avionics shop so do anything else besides the IFR transponder check? The W&B
seems to be negligible given the <1lb weight difference.

Thanks in advance.

Marco

I did a 320A slide-in replacement for an old Narco AT-50.
I replaced both the antenna and the coax, primarily because they were
of unknown age. The installation was painless and I filed a 337 and had
a transponder cert done to complete the process.

Rip

Marco Leon wrote:
> The KT-76A finally went tango uniform so I'm getting a Garmin GTX-320A with
> the adapter for the King transponder. Actually, the KT-76A still works but
> it takes 45 minutes to an hour for it to warm up so it's equivalent to dead.
>
> Has anyone out there gone the slide-in replacement route on the Garmin? How
> was the experience and did you have to get a new antenna (I have the
> pole-type)? Lastly, was it a logbook entry or did you have to get an
> avionics shop so do anything else besides the IFR transponder check? The W&B
> seems to be negligible given the <1lb weight difference.
>
> Thanks in advance.
>
> Marco
>
>
>

"rq3" > wrote in message
...
>I did a 320A slide-in replacement for an old Narco AT-50.
> I replaced both the antenna and the coax, primarily because they were
> of unknown age. The installation was painless and I filed a 337 and had a
> transponder cert done to complete the process.
>
> Rip

Did you file the 337 yourself or did you have a shop do it?

Marco Leon wrote:
> "rq3" > wrote in message
> ...
>
>>I did a 320A slide-in replacement for an old Narco AT-50.
>>I replaced both the antenna and the coax, primarily because they were
>>of unknown age. The installation was painless and I filed a 337 and had a
>>transponder cert done to complete the process.
>>
>>Rip
>
>
> Did you file the 337 yourself or did you have a shop do it?
>
>
I'm an A&P/IA. I did it myself.

Rip

Curious to know... did you make this a field approval? So a fed
stamped box
3 on the 337? If not, what approved data did u use?

Around here, A&Ps are limited to installing ELTs. A real pain. I
have to get a shop to run all this thru... then they have little
problem.
A&Ps have no standing, even IAs.

I'm curious whether it's really different where you are.

Bill Hale Loveland CO

On May 4, 2:11 pm, Rip > wrote:
> Marco Leon wrote:
> > "rq3" > wrote in message
> ...
>
> >>I did a 320A slide-in replacement for an old Narco AT-50.
> >>I replaced both the antenna and the coax, primarily because they were
> >>of unknown age. The installation was painless and I filed a 337 and had a
> >>transponder cert done to complete the process.
>
> >>Rip
>
> > Did you file the 337 yourself or did you have a shop do it?
>
> I'm an A&P/IA. I did it myself.
>
> Rip