Finished deburring all fuselage skins Drilled holes for forward vent scoop and fabricated metal reinforcement strips in F820L forward skin Dimple countersunk #40 firewall flange holes common with forward skin Dimple countersunk side flanges of F866 baggage bulkhead sides Dimple countersunk four holes in forward floor panel between Center Section attach points Dimple countersunk #30 holes in forward floor panel that correspond with countersunk holes in lower longerons Dimple countersunk #40 holes in F870 E and B stiffeners Final drilled #40 nutplate holes in F864 and F865 stiffeners and dimple countersunk #40 holes common with forward side skins Dimple countersunk #40 holes in R&L F860A,B and C armrest and R&L F805 and F806 bulkheads Dimple countersunk #40 holes in F815A&B outboard seat ribs Dimple countersunk #40 holes in F815CL&R angles
