Check all HS 904 main ribs and HS 905 nose ribs were straight and fluted as needed. Fabricated two HS 909 shims from AS3-040 material. Match drilled shims to the aft side of the front spar at the most inboard main rib sections. Clecoed all the HS 904 and HS 905 ribs to the front and rear spars and match drilled to #30 holes. Disassembled all the parts and deburred all #30 holes, all the rib and spar edges, and the edges of all the lightening holes.
