sentences:  In 1945 CASA opened a factory in Madrid dedicated to manufacturing the parts and sub-assemblies of their various aircraft and those that they had contracts to repair and overhaul.In 1946 CASA re-established the Projects Office and resumed the design of aircraft based on the firm's proprietary technology.In 1957 CASA won a contract from the United States Air Force for the maintenance of the F-100 Super Sabres based in Europe and Turkey and a contract from the Spanish Air Force to overhaul T-33s in the Spanish Air Force.