Side airbags installed in the backrests of car seats demand a special seam construction on the backrest cover. In order to become fully effective in case of an accident, the airbag must be able to break through the seam of the cover at the predetermined position. This so-called snap seam must not only enable the safe outlet of the airbag, but it must also have the necessary stability to withstand the strain of everyday use. Thus the standards for the manufacturing process and the special seam parameters in the outlet section of the airbag require a permanent supervision. The engineered sewing station 550-767 has especially been designed for process-oriented safety and documentation and guarantees that the quality of every snap seam corresponds to the safety standards.