scope:

This instruction implements AFPD 21-4, Engineering Data. It provides guidance and designates responsibilities for preparing, approving, authenticating, revising, and releasing Air Force engineering drawings, associated lists, and AF Forms 3925, Engineering Order, 3926, Engineering Order (Continuation Sheet), and 3927, Engineering Order (Parts List).

This instruction applies to all major commands (MAJCOM), field operating agencies (FOA) and direct reporting units (DRU), including the Air Force Reserve Command and Air National Guard, that prepare, change, and revise engineering drawings, except those designated under the listed exemptions. Send comments, questions, and suggested improvements on AF Form 847, Recommendation for Change of Publication, through channels to HQ USAF/ ILMM, 1030 Air Force Pentagon, Washington DC 20330-1030 with an information copy to HQ AFMC/ ENPM, 4375 Chidlaw Road, Rm N145, Wright-Patterson AFB OH 45433-5006. See Attachment 1 for a glossary of references and supporting information.