Originally Posted by
Flyinlynn
I think it is a new aircraft based on the CRJ 700 airframe. I don’t think they are retrofitting old 700’s just using the 700 airframe design and revamping the seating and galley configurations
https://www.bombardier.com/en/media/newsList/details.bca-20180206-bombardier-launches-new-innovative-50-seater-aircra.bombardiercom.html
If anyone remembers the CRJ440, those were later converted to CRJ200s by changing the interior layout. The CRJ705s Jazz were recently changed to CRJ900s by changing the interior and some paperwork.