AC-23-4 states "The FAA does not encourage the approval of retrofit shoulder harness installations as minor changes. The preferred methods of approval are Supplemental Type Certificate or Field Approval. However, the FAA should notforbid the approval of a retrofit shoulder harness installation as a minor change in the front seats of those small airplanes manufactured before July 19, 1978, and in other seats of those small airplanes manufactured before December 13, 1986. A retrofit shoulder harness installation may receive approval as a minor change in these small airplanes if: The installation requires no change of the structure (such as welding or drilling holes).
My question, does anybody know of a way to weld in Atlee Dodge shoulder harness tabs as a minor alteration?