Founded by the late Gerry Beck in 1974 and located in Wahpeton, North Dakota, Tri-State Aviation, Inc. (TSA) is a company that, among many other talents, specializes in restoring P-51 Mustangs.

Tri-State Aviation (TSA) provides a full array of aircraft maintenance, repair and restoration services as well as a diverse offering of machine shop services to industries such as agriculture, aerospace, architecture and engineering.