The Cessna 120-140 Association Forum

I was exploring making a set of the bucking bars detailed in Cessna Service Letter SLN-24. A PDF version is available in the resources on the association web site. Unfortunately, the PDF is not clean enough to read the detailed dimensions of the bucking bars on the drawing. I enlisted my experienced friends in Cessna technical support, but we were unable to locate this service letter in the company achieves nor the drawing.

I'm curious if anyone has some expertise to share on these bucking bars. Does anyone have a clean drawing that the dimensions can be read? Does anyone have a set of the these from way back when? Does anyone one know the specific airframe locations that the individual bucking bars are used for?

Print the picture. Enlarge it until some of the obvious dimensions are correct (15", 10", 6", etc) then print it again. Now you have a 1:1 drawing you can measure any of the other dimensions from. Close enough for government work...