Riveted counterbalance skin to tip rib assembly. Riveted E-910 Reinforcement plates and K1000-6 Nutplates to Front Spar. Riveted E-905 Root Rib to Front Spar. Riveted WD-605-R-4 Elevator Horne for Front Spar Assembly. Riveted E-1015 Reinforcement Plate to Elevator Skin. Riveted Static Wick Nutplates and Reinforcement Plates to Elevator Skin. Riveted E-1008 Ribs (Primed ones only) to E-1001B Elevator Skin.