YO-59, O-59/ L4 grasshopper questions

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thejeepguy43

Recruit
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Apr 19, 2026
I have some questions about the frames and what to look for and where I can find some identifying marks like the manufacturers serial number or designation.

Would the wings provide any information?
 
Typically on L-4's the data plate is located on the decking behind the rear seat. It's possible the data plates may have been in different locations thru out the various model runs.

The wings would not have a data plate for the specific aircraft, but could/would have part number plates.

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Typically on L-4's the data plate is located on the decking behind the rear seat. It's possible the data plates may have been in different locations thru out the various model runs.

The wings would not have a data plate for the specific aircraft, but could/would have part number plates.

View attachment 875957


View attachment 875958
Unfortunately I don't think thats an option for me.
Any pictures of the structure of the back deck you can provide or other serial number locations that may be stamped into the frame?
 

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