Michael wrote:
A TSO isn't approval for isntallation in itself.

That is true only for major repairs/alterations. For minor
repairs/alterations, a TSO is approval, since it constitutes data
acceptable to the administrator.


"Data acceptable to the administrator" isn't necessary for things
that aren't major alterations. That phrase comes from the
major alteration framework. The fact that it is a non-major
alteration implies you've used something consistant with the
original aircraft design. If the TSO helps you make that
decision great, but it's still not installation approval.