Per step 3 page 08-03 riveted HS-1220L AST control horn to inboard rib HS-1222. Also riveted HS-1220R AST control horn to inboard rib HS-1222 for right side. Completed step 5 page 08-02 riveted top flange of 4 –HS 1222 AST ribs to inside top surface of HS-1221-L AST skin. Completed step 5 page 08-02 riveted top flange of 4 –HS 1222 AST ribs to inside top surface of HS-1221-R AST skin. Completed step 4 installed and riveted HS-1219-L AST spar to inside of HS-1221-L AST skin per step 4 page 08-03. Completed step 4 installed and riveted HS-1219-R AST spar to inside of HS-1221-R AST skin per step 4 page 08-03. Completed step 1 page 08-04 riveted HS-1221-L AST skin to HS-1222 AST ribs on bottom surface. Completed step 1 page 08-04 riveted HS-1221-RAST skin to HS-1222 AST ribs on bottom surface. Installed AST hinge half to HS-1221-L AST skin and HS-1219-L AST spar per step 2 page 08-04. Completed step 2 as above for the right side AST assembly.
