Morgans wrote:
"Gig 601XL Builder" wrote

Now here's the kicker. Just because that certified engine and prop
were mounted and flown in an experimental they can never be
considered certified again.

That is not consistant with what I have read.

If you keep the original data plate on the engine, and do all repair
work and follow all of the directives for the engine, and the work is
done by an A&P, then what you mount it in is not important. When you
take it out, if all work (engine maintenance and rebuilds) as been
done up to FAA standards by or supervised by an A&P, you can indeed
put the engine back into a certified plane. AS far as the prop goes,
I am not up with the requirements on them, but I "believe" the same
standards apply for it.

The problem arises that if ANY alterations or work has been done to the
engine not by an A&P or supervised by one the certification is in doubt. In
the real world once it is in an experimental you'd be hard pressed to get
anyone to believe that it is still a certified engine.