MIL-HDBK-6870A, DEPARTMENT OF DEFENSE HANDBOOK: INSPECTION PROGRAM REQUIREMENTS NONDESTRUCTIVE FOR AIRCRAFT AND MISSILE MATERIALS AND PARTS (28 AUG 2001) [SUPERSEDING MIL-I-8870E]., This handbook is for guidance only. This handbook cannot be cited by the government as a requirement. If it is, the contractor does not have to comply. This handbook covers requirements for establishing the nondestructive inspection (NDI) program for the procurement of all supplies and products when directly referenced in the item specification contract or order. This handbook should apply to new structural components for aircraft and missiles and their propulsion systems when the design activity or system specification requires nondestructive inspection for acceptance.