Bend the labs on both F-10109 Louvers to form the F-10109-L and -R Louvers. Bend each tab approximately 45° along the bend lines.
Cleco together the F-10108A Support Bracket, the F-10108B Splice Plate, and the F-10108C Plate. Final-Drill #40 all of the 3/32" holes common to the three parts and the six pairs of nutplale attachment rivet holes in the splice plate.
Machine countersink the nutplate attachment rivet holes in the F-101088 Splice Plate and all the holes in the F-10108C Plate for AN426AD3 rivets.
Machine countersink the holes in the bottom cowl used to attach the F-10109 Louvers for the heads of AN426A03 rivets.
I scuffed, acid etched, cleaned, and primed with AKZO all the parts.
I cleaned up the holes in the bottom cowl for the louver plates.