Window crank repair

A quick learner from Waikoloa, HI says:
The part that the crank handle attaches to, (looks like a bolt, or screw) is coming out and you can turn it to open the window but when you try to close, it pops right out of the mechanism.
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Casey from SWISCO responded:

Hello,

If the stem that the handle attaches to is broken, unfortunately, that means that the entire operator would need to be replaced. I would recommend starting by comparing the specifications of the 39-348 operator, which uses the 36-078 shoe studs, to your original assembly. If you would like new t-handles as well, see the 39-102. Thank you! 

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