Hinge line for Top Cowl Panel: drilled to size and riveted left hinge; drilled for and installed nut plates to top of firewall flange to accept top cowl panel. Installed to mock fit. The lower cowl was fabricated from 2024 and made a good fit except for the lower firewall flange attach points. The cowl puckered and 2024 is too hard to form a tight fitting lip. So, I acquired some 3003H13 and made a second lower cowl using the first as a pattern. Match drilled to lower firewall flange.
