Match drilled balance of #40 hole in both W-1007A-L & R. Match drilled #30 holes in Rear Spar attach points in both Left and Right Wings. Countersank #40 holes in W-1007A flanges both wings as per directions. Countersank #30 holes in both W-1007C as per plans. Disassembled and deburred all holes. Dimpled W-1007A flange holes and Aft Rib Tabs as per directions. Prepped and primed Rear Spar parts and Wing Box J-Stiffeners. Reassembled all parts and began riveting Right Rear Spar.
