Cut holes in F16-01 Forward Fuselage Floor for L01-02 x 2 Main Gear Leg. Rivet F16-01 to: F10-13 L&R Seat Belt Attach Channel F10-12 Center Support Channel F10-09 L&R Support Channel F09-02 Seat Belt Attach Assembly F13-06 L&R Lower Longeron Rivet F10-24 x 2 Gussett Plate to F13-06, F09-02, F10-25 Gussett Spacer.