(1) Polished and match drilled stiffeners (2) Drilled Fuel Filler Flange and deburred. Made vent line holding bracket (3) Drilled Fuel Drain holes in skin (4) Deburred T407 and T411 (5) Drilled fuel line and anti-rotation bracket rivet holes in T411 (6) Used flycutter to cut access hole in inboard tank rib. (7) Drilled access plate screw holes and nutplate holes in rib and deburred
