This paper addresses ultrasonic investigations of the pore content in CFPR laminates as part of the German research project MaTech. Project partners are Airbus, Bremen, Ingenieurbüro Dr. Hillger, Braunschweig, and TuTech, Hamburg-Harburg, with DLR, Braunschweig, as a subcontractor. As backwall echo evaluations are not possible in the skins of sandwich components, investigations in echo-technique had to be carried out with the aim of optimising the test parameters. Based on these results, a portable ultrasonic system with C-scanning for pore content evaluation has been developed (Demonstrator). This paper also presents results of quantitative pore measurements.