Brief Description: Rear spar reinforcement fork and doubler
Clecoed rear spar reinforcement fork, and all doublers in place and match drilled #30 to wing ribs and spar. Match drilled lower spar flange to rib attachment with #40 drill. Countersunk bottom row of rivets in L and R W-1007C doubler plates as shown for #4 rivet. Countersunk all holes in upper spar flange above each rear spar doubler plate for #3 dimples. Dimpled lower aft rib tabs and corresponding holes in lower spar flange. Dimpled the 26 most inboard upper spar flange holes as indicated above reinforcement fork.
