Simply not true, John. A DAS must be tied to a repair station. There
are many STC holders that are not repair stations. They still can
produce approved parts without a PMA. The reference is FAR 21.435


On Thu, 18 Dec 2003 07:22:47 -0800, "Tarver Engineering"
wrote:


"Bill Zaleski" wrote in message
.. .
Parts produced under an STC do not need PMA approval. Chew on that
one, Tarver.

Only if the STC holder is a DAS, which is of course Part 21 authority.

On Wed, 17 Dec 2003 21:56:07 -0800, "Tarver Engineering"
wrote:


"CivetOne" wrote in message
...

snip
So, my bottom line is that the procedural requirements for obtaining
design
approval of either a new design or changes to an existing design are
contained
in part 21.

For the aircraft's manufacturer.

The design approval, either a TC or an STC, is issued in
accordance with the procedures in part 21.

No, the procedures contained in Part 23 are intended to enable a third
party
to receive STC Aproval, for a change to a small airplane. From the STC,
with a licensing agreement in place, the parts used to make that change
can
get PMA aproval.

The airworthiness requirements to
which the design or design change must comply are contained in the
airworthiness standards (e.g., part 23 for small airplanes), or part 21
for
unique aircraft (e.g., primary category).