The German Army is using the Sikorsky helicopter Typ CH-53 G in the marine version, this means that the tail with the rear rotor can be folded sidewise in order to safe space during storage. During flight the fuselage is locked by two gear racks that slide in the bore hole of an aluminium housing. Due to the high friction during the movement of the steel racks the inner bore surface is damaged of up to 1 mm depth. In this paper the repair of this inner surface of the bore by arc-wire spraying is described. A special gun extension was developed so that the narrow bore (diameter 48 mm; length 400 mm) can be repaired. Preliminary test results with various materials are presented. Paper text in German.

Coating shops are under increasing pressure by stringent legislation to demonstrate sound environmental performance. This paper describes how one can combine the environmental requirements according to ISO 14000 with existing Quality Management Systems according to ISO 9000. The Environmental Management System requires that a company establishes and maintains an environmental policy with a strong commitment to continual improvement and prevention of pollution. The company has to establish environmental targets with a timeframe by which they are to be achieved. In this paper, some practical aspects of prevention of pollution by using new processes, practices and materials will be described. Some important aspects like recycling of waste from dust collectors or sand blasting units will be discussed.