Fit and match drill the E-910 reinforcement plates to the E-902 spar. Cleco the E-902 spar to the E-901-L skin. Cleco the E-905 left elevator root rib to the E-901-L skin. Cleco the E-907 elevator trim spar to the E-901-L skin. Match drill Cleco the elevator counterbalance sub-assembly to the E-902 spar and E-901 skin. Back-rivet the skin stiffeners to the top of E-901-L. Rivet the E-903 and E-904 rib webs together. Rivet the E-913 counterbalance skin to the ribs Rivet two E-910 plates and two K1000-6 nutplates to the aft side of E-902. Rivet E-905 to E-902 Rivet the WD-605L to the rib and spar Rivet the E-902 spar to the top of the E-901-L skin. Back-rivet the stiffeners to the bottom side of the E-901-L skin. Rivet the K1100-06 nutplates to E-615PP and rivet the E-615PP to the skin. Rivet the counterbalance assembly to the E-902 spar. Rivet the E-921 gusset. Cleco the bottom of the E-901 skin to the E-902 spar. Rivet the two rivets top and bottom that join the E-913 counterbalance skin to the E-901 skin. Rivet the bottom of the E-901 skin to the E-902 spar. Finnish trailing edge Rivet the E-907 elevator trim spar to the bottom of the E-901 skin. Rivet the tip and root ribs to the skin
