In case you didn't realize I have been inside the Wing Center section numerous times when I was younger. We entered thru the Fuel Tank Plate opening on the lower side of the wing center section..In Fact we had to install Fuel Cell Bladders with special lacing cord on some of our B 727's in the Center Section. So I'm very familiar with the Wing Center Section Structure and the "Bottle Bolt" castings and Bottle Bolts [also called Pins] where the left and right wings attach to the Center Section. In fact we accessed the rear Bottle Bolts thru the wheel wells and used Liquid Nitrogen / Dry Ice to shrink them before installation. The wings had to be shored before we removed the Bottle Bolts for inspection and/or replacement of the casting. I could provide more details but this thread is not the place to do it.
Last edited by B727223Fan; 2nd Oct 2019 at 04:32.
Reason: incomplete info.