Originally Posted by
Ftrooppilot
Couldn't a Mesaaba CRJ900 Captain (500 hrs in aircraft) end up as a CRJ900 FO flying with a CRJ900 Capt (25 hours in aircraft) who used to be a mainline DC9 FO ?
Yup, except that more than likely that DC-9 FO with your theoretical 25 hours in type actually has several thousand hours PIC in the CRJ/ERJ since they were almost all regional captains 6 months ago or so.