Install the reinforcement plates and platenuts on the spar. Rivet the R-904 rib and associated parts. Rivet the R-912 counterbalance rib to the R-902 spar. Rivet the R-913 counterbalance skin to the counterbalance rib, but not the spar. Install the E-614-020 counterweight Cleco both skins to the spar. Set the R-901 skins and the R-913 counterbalance skin and three that join the rib, counterbalance skin and spar. Rivet the skin to the skeleton. Rivet the trailing edge. Form The leading edge
