This document specifies requirements for the additive manufacturing of metallic parts with directed energy deposition in the aerospace industry. These can be additively built parts or additively built additions to existing parts. Within the application scope of this document, wire is used as feedstock, and arc processes (gas-shielded metal arc processes, tungsten inert gas processes, plasma arc processes) are used as the main energy source. This document is to be used in conjunction with the engineering documents, if required by the engineering authority. This document does not apply to national or international safety and health regulations.