TS EN 2851

TS EN 2851 is a technical aerospace standard concerned with the marking of parts and assemblies other than engines on drawings. Its subject is not the physical manufacture of the item itself, but how a component’s identity, orientation, mounting relationship, and related drawing information are shown clearly on engineering drawings. In aerospace work, drawing conventions are essential because they provide a shared reference between design, production, inspection, and maintenance.

What drawing marking means in practice

From a general technical perspective, marking on drawings can include part identification, orientation cues, assembly position, revision-related information, reference features, or other identifiers needed to make a drawing unambiguous. This distinction matters in non-engine aerospace hardware because aircraft systems often contain many closely related parts, and even small drawing ambiguities can lead to manufacturing or assembly errors. The title of this standard shows that its focus is specifically on how parts and assemblies are indicated on the drawing itself.

Why it matters in aerospace documentation

In aerospace engineering, a drawing carries more than geometry: it also communicates how the part belongs within the larger system. Marking is therefore a documentation discipline that helps design intent remain consistent through manufacturing and downstream use. Non-engine hardware may include structural items, fittings, housings, supports, and similar assemblies. The technical value of this standard lies in supporting a clear and consistent aerospace drawing language for those components, so their identification on the drawing remains understandable and reusable across teams.