Originally Posted by
zemike888
Thank you for your feedback!
But I still have a question: if I'm allowed to check in this oversized carry-on bag at the boarding gate, and once in the cabin, I realize it can't fit in the overhead compartment, what happens?
It will fit with the dimensions you mention unless your boarding group is later and there is simply no space. If there is no space it will be gate checked.
See my post #4.