Field Guide
Which MIL-STD Governs Your Technical Manual?
The Map
Five Standards, Divided Territory
| Standard | Owner | What it governs |
|---|---|---|
| MIL-STD-40051E | U.S. Army | The Army's own TM content standard: work packages and government DTDs, for page-based and interactive manuals alike. Revision E (March 2025) replaced the separate -1 (IETM) and -2 (page-based) parts |
| MIL-STD-3001 | NAVAIR | Naval aviation technical manuals on the work package model, the standard most often confused with 40051 |
| MIL-STD-3031 | U.S. Army | The Army's business rules for S1000D: the Army's other road, for programs contracted into the international specification |
| MIL-STD-3048 | U.S. Air Force | The Air Force's business rules for S1000D, applied to Technical Order content produced under the specification |
| MIL-STD-38784 | DoD-wide | General style and format for technical manuals: a presentation layer that supplements content standards rather than competing with them |
The map has two axes, and most confusion comes from collapsing them. The first axis is whose content model: the Army and NAVAIR each maintain their own work-package standards (40051, 3001), while S1000D is the international model that services adopt through business rules: 3031 for the Army, 3048 for the Air Force. The second axis is which layer: content standards define what a manual is made of; 38784 governs how it is styled and formatted, and can be cited alongside any of the others. A single deliverable can legitimately owe a content standard, a business-rules standard, and the style layer at once, at three different revision letters.
Which is the practical advice in one sentence: never scope from the standard's name, always from the citation: standard, part, revision, change notice, tailoring. The TM contract review checklist walks that reading, and the 40051-versus-S1000D comparison covers the fork that matters most.
Not This One
MIL-STDs People Land Here Looking For
A MIL-STD number on its own tells you almost nothing, and the numbering is not grouped by subject, so neighboring numbers can govern completely unrelated things. These come up regularly alongside technical manual questions and govern something else entirely. If you arrived looking for one of them, this is the honest answer rather than a page pretending otherwise.
MIL-STD-1540
Test requirements for space vehicles: environmental and structural ground testing for launch vehicles, upper-stage vehicles and space vehicles.
MIL-STD-1629A
Procedures for performing a failure mode, effects and criticality analysis. The FMECA standard, and a reliability input rather than a publication output.
MIL-STD-881
Work breakdown structures for defense materiel items. Programmatic rather than technical: cost, schedule and contract structure.
MIL-STD-8591
Airborne stores, suspension equipment and the aircraft-store interface in the carriage phase. Structural and mechanical design criteria.
MIL-STD-1366
Interface standard for transportability criteria: how an item is moved, not how it is documented.
A representative list rather than an exhaustive one. Each scope above was checked against the issuing body's own listing; where we could not verify a scope, the standard is not listed at all.
FAQ
Questions We Hear
Which MIL-STD applies to Army technical manuals?
One of two, and the contract decides: MIL-STD-40051 (the Army's own content standard, with Part 1 for IETMs and Part 2 for page-based manuals), or S1000D applied through MIL-STD-3031, the Army's business rules for the international specification. The incumbent base sits on 40051; newer and coalition-adjacent acquisitions increasingly cite the S1000D road.
What standard governs Air Force technical orders?
The Air Force runs its Technical Order system under its own TO management framework; where TO content is produced under S1000D, MIL-STD-3048 supplies the Air Force's business rules for it. As everywhere in this map, the specific contract's citation (standard, revision, tailoring) is the governing fact.
Do these standards apply to contractors?
Yes, through the contract. None of them binds anyone by existing; they bind when a contract or data item description cites them, at the cited revision, with the cited tailoring. That is also why the first act of scoping any defense TM deliverable is pinning the citation exactly; our TM contract review checklist starts there.
Which standard should a new program choose?
Usually none of you gets to choose. The acquiring service's program office sets the citation. Where a contractor does have influence early, the real questions are the fleet's existing library, coalition and data-exchange obligations, and which road the sustainment organization can actually operate. The comparison that matters most in practice is 40051 versus S1000D, and we've written it up in full.
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