The use of chemical milling for weight reduction in aircraft aluminum parts, such as skins and frames, has an environmental impact issue, and needs to be eliminated. Therefore, Mitsubishi Heavy Industries, Ltd. has developed a new environmentally friendly high-precision machining method to eliminate chemical milling. This developed machining method was first implemented to the Boeing 777X series, which has been produced since 2017. For the latest cargo aircraft, the 777-8F, the transition to this machining method has been fully completed. This report describes the MAG machining developed to realize sustainable aircraft manufacturing and its effects.
