MIL-HDBK-6870 Nondestructive Inspection Program Requirements for Aircraft and Missile Materials and PartsThis handbook provides guidance to government personnel and contractors for defining the requirements for establishing an acceptable Nondestructive Inspection NDI program for the development, production, and sustainment phases of DoD aircraft and missile structural components when directly referenced in the item specification contract or order. This handbook is for guidance only and cannot be cited as a requirement.