Reinstalled rear seatblet brackets and flap actuator weldment bearing blocks with aft bolts, Match drilled front holes for block mounting bolts. Cut, shaped and smoothed F-830B-1 floor stiffeners and smoothed F-805C-1 floor support angle. Clecoed one stiffener and angle to front floor and fit to fuselage. Match-drilled screw holes and nut plate rivet holes in F-805D left and right brackets. Countersunk rivet holes and riveted offset nut plates to brackets. Match drilled front seat hinge to front seat floor.