jblanton

The 140 doesn't have the piano hinge you see  on the 150/172. It has two metal ribtails similar to the kit fox. They go into the ailerons and are secured with a bolt and nylon lock nut. 

SB-9-1 calls out to reinforce the end ribs only.  I think I am going to do all 10 of  them on my Model 2 project.  I had a very similar experience in my Cessna 140 a few years ago. The left aileron outboard hinge  became detached on climbout. It stayed level, but jammed the controls.  I was able to put it in a plowed field without any harm.  

Jeff