Removed the flap actuator weldment, seat floors and aft baggage floors from the fuselage.
Machine countersunk the the floor support angle, spacers and inboard seat rib angles.
Drilled and countersunk the outboard seat rib angles to attach nutplates at the forward mounting bolt location for each flap bearing block and riveted the nutplates in position.
Deburred the stiffeners and match drilled them to the seat floors.
Match drilled the rear seatback hinge to the floors.
Drilled and dimpled the aft baggage floor for attaching nutplates.
Deburred all the holes in the seat floors and the common holes in the fuselage substructure.
Dimpled the seat floor components as per instructions.