Not quite. A parts manufacturer approval part (PMA) is identical to
an individual TC part in every way, so it is considered a direct
replacement part for OEM parts. For example, if you change a Piper
PA-23-250 nose gear actuator with a PMA nose gear actuator, that
action only requires a logbook entry under section 43.9. On the other
hand, a Technical Standard Authorization (TSO) part is a generic
part, like tires, communication and navigation equipment, seat belts,
instruments, etc., that could be used on many different makes and
models of aircraft. In many cases, installing a TSO part “may”
require a Form 337 because installing it would be considered a major
alteration of the original type design. For example, installing a new
TSO glass cockpit in a Cessna 172 would require a Form 337.
************************************************************************
***
On May 9, 2008, at 11:18 AM, WILLIAM BIGGS wrote:
Actually the issue here is not TSO but PMA (Parts Manufacturer
Approval)
Trutrac does not have PMA to manufacture certified instruments.
here is a related story
http://www.aeroelectric.com/Reference_Docs/FAA/Alaskan_L-40_Fiasco/
be sure to read the "obrien report" linked to at bottom of that page.
Bill
To: [email protected]
From: [EMAIL PROTECTED]
Date: Fri, 9 May 2008 10:56:20 -0400
Subject: Re: [ercoupe-tech] Re:Trutrak ADI Attitude indicator
installation
Pretty safe bet that since you are attempting to install non-TSO'd
equipment in a certificated aircraft these days you will not
receive a field approval. Absent such approval the installation is
illegal.
On May 9, 2008, at 10:39 AM, fnelson913 wrote:
The way that I understand this issue, I would say that field approval
is NOT required since this type of equipment is not required to be
TSO approved. Therefore, you need no special authorization to add
this equipment to your panel. Am I missing something.
Frank Nelson
N51DV - 415C
--- In [email protected], [EMAIL PROTECTED] wrote:
>
> The general, safe and undisputable answer to that question is YES ,
you
> can, if you get a field approval from your local FSDO. Perhaps
somebody
> knows regulation technicalities or loopholes that allow it to be
legally
> installed without a field approval, and if so, we would like to
know!! I
> am all for that.
> Eliacim
>
>
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