This is the 40 airplanes they are talking about.
>> In connection with the ASA and SkyWest Airlines contract carrier agreements, Delta or Comair, Inc., a wholly owned subsidiary of Delta, will lease or sublease 40 regional jet aircraft in total to ASA and SkyWest Airlines. If either ASA or SkyWest Airlines terminates its contract carrier agreement as a result of a material breach by Delta, the aircraft leases and subleases to ASA or SkyWest Airlines, as applicable, will terminate at the same time.<<