Experimental exhibition has different rules from other categories, but the FAA also allows for owner produced parts on certified planes. https://www.faa.gov/doc

Experimental exhibition has different rules from other categories, but the FAA also allows for owner produced parts on certified planes. https://www.faa.gov/documentLibrary/media/Advisory_Circular/AC_20-62E_CHG_1.pdf https://www.faa.gov/documentLibrary/media/Advisory_Circular/...