Originally Posted by
WacoJoe
The rules on owner produced parts would only apply to a standard category aircraft. Since the aircraft in question is experimental/exhibition category, there's no need to worry about who produced the parts. As long as the installation doesn't consitute a "major change" there's no issue with certification or approval. Replacing the wings, even in their entirety, is only a repair, not a major change so long as the same wing planform, stucture and airfoil is maintained. It would only be a major change if the wings were modified, such as a change in span, chord, airfoil, major structural components, addition or removal of flaps, etc. If a major change is incorporated there is a procedure to follow called out in the aircraft's operating limitations that were issued by the FAA as a part of the aircraft's airworthiness certificate.