As far as I understand it... the flowback to Mesaba (if it occurred) would not displace any current pilot. The flowbacks would occupy the slots that were vacated by the Xj guys who actually flowed up. When they flowed, their position and seniority number remained as FLOW. So no... an NWA flowback would not displace a CRJ900 Captain to FO and end up swinging gear for a flowback.