The 2 America West Express F70's were operated by a division of Mesa called Desert Sun Airlines. They had some type of lease option arrangment with Fokker and when the 2 year lease was up, they retuned them to Fokker instead of purchasing them. They were replaced with CRJ's. The F70's main route was DesMoines-Phoenix-Fresno. I think they also operate PHC-Spokane for a short time.