Cleco the Right Arm Rest Side to the Cabin Floor. With a #30 drill bit, expand the holes in the Right Arm Rest Side through the Cabin Floor and the Floor Stiffener and Cleco.
Cleco the Seat Support to the Cabin Floor and Seat Channel. With a #30 drill bit, expand the holes in the Seat Support through the Cabin Floor and Seat Channel and Cleco.
Cut two pieces of L angle 150mm long. Position the L angle flush with the front of the Gear Channel against the Seat Support and clamp the L angle to the Seat Support. With a #40 drill bit back drill through the Seat Support into the L angle and Cleco. Then back drill through the intersecting hole in the Gear Channel for the L angle and the Rear Seat Channel. Remove the L angle and layout 4 additional rivets on the L angle. Cleco the L angle in place and back drill through the L angle into the Gear Channel. With a #30 drill bit, expand the holes in the L angle and Cleco.
Position the Cabin Side on the Rear Fuselage. Cleco the rear rivet line to the Side Skin. Check the length of the Longeron at the Baggage Back. If required, trim the Longeron to fit against the Baggage Back.
Remove the Cabin Sides from the Rear Fuselage. Cleco the Cabin Sides to the Floor Skin.