For Mesa to continue to exist, they would essentially have to become a 30-40 aircraft airline, since they are losing their United and Delta flying. I doubt that a US Airways contract alone is enough to keep them from liquidating. That being said, if Mesa does liquidate, then it would be super hard for Airways to replace that flying. Republic is stretched thin right now with their new aquisitions to pick up that much extra flying and aircraft at once. Airways is short on cash, so I don't see how they could afford to buy the planes for PSA/ Piedmont. Plus, it would take months to hire and train crews for those aircraft. Airways only option is to hope Mesa survives, or else start hiring more pilots now and beefing up PSA to get ready to cover new aircraft (if they can even afford to obtain them). If Mesa goes belly up, and Airways doesn't have a plan in place, they will be in a world of hurt.