Originally Posted by
Often1
I would contact UA and ask to speak with the "Accessibility Desk." Have the exact dimensions of the item in its case. Include handles, wheels and whatever else might protrude. If the item will fit and is within UA's rules, ask that the appropriate entry be made in your PNR notes.
This.
An entry in a PNR from the "Accessibility Desk" once stopped a debate with a gate agent right in its tracks; the debate was over a newer model POC that had been recently approved by the FAA (like that month) but had not been added to UA's official list yet.