AWS D17.1/D17.1M, 3rd Edition - Specification for Fusion Welding for Aerospace ApplicationsThis specification contains requirements for fusion welding and non-destructive examination (NDE) of aerospace flight hardware as well as for the welding and NDE of non-flight hardware. When this specification is stipulated in contract documents, conformance with all provisions of the specification shall be required, except for those provisions specifically exempted or modified by the Engineering Authority or contract documents.