Root rear rib fitted. Root nose rib, rear rib, and rear channel assembly were disassembled, deburred, ZP applied, and rivoting together. Began fitting of wing gas tank "U" channel (8V11-3). Disassembled, deburred, applied ZP to gas tank "U" channel x 4, reassembled, and rivoted. Fit fuel tank channel x2 (8V11-5HD). Fit "U" stiffener (8V11-8HD) to spar.
