Was it the deal with AAR? Mesa Air Group announced that it has reached an agreement with AAR Corp. (AAR) in support of Mesa Air Group's ongoing restructuring efforts. The parties have agreed to amend certain parts and maintenance agreements supporting Mesa Air Group's CRJ200 & ERJ145 aircraft fleet and exchange Senior Convertible Notes due in 2023 (2023 Notes) held by AAR for shares of Mesa Air Group's common stock, in consideration for a cash payment and certain agreed upon future obligations. The parties have agreed to certain amendments to the parts and maintenance agreements which allow Mesa Air Group's to reduce monthly fees paid under such agreements as the number of aircraft in its CRJ200 & ERJ145 fleet is decreased. Additionally, these amendments enable Mesa Air Group to terminate the respective parts and maintenance agreements without penalty, if it disposes of an entire aircraft type.