Clamped gussets (7F7-9C) to the Vertical Lower Channel (7F7-2C) and the Upper Channel (7F7-1SP).Drilled and clecoed the gussets to the vertcal lower channel and the upper channel.Layed out two rivet lines on the Upper Channel Stiffener (7F7-7SP).Drilled and clecoed the top channel stiffener to the Firewall and the Upper Channel.Layed out centerline and holes locations on Vertical Top Channel (7F7-3).Drilled holes and clecoed the vertical top channel to the Firewall.
