Clecoed the F-833F seatback top web to the F-833E seatback top panel and rived all holes common between the two parts Clecoed the F-833C-1 seatback top flange to the F-833F seatback top web and rived all holes common between the two parts Clecoed the remaining rear seat parts to the upper portion of the seat shown in rear seatback assembly. Riveted all remaining holes in the rear seatback assembly