TS EN 4408-006

TS EN 4408-006 is the part of the aerospace technical drawing series that deals with preforms made of composite materials. It addresses how these preforms are represented on drawings and which pieces of information need to be indicated in the technical documentation. In practice, its value lies in making the intended preform definition consistent across design, manufacturing, and inspection contexts.

What a composite preform means in drawing practice

In general technical terms, a preform is an intermediate form prepared before the part reaches its final shape. For composite aerospace parts, that intermediate stage can be especially important because fibre orientation, ply arrangement, cut geometry, and handling references all influence the final component. A drawing standard in this area helps ensure that the same preform is understood in the same way by different teams and suppliers. This document is about the drawing representation of preforms, not about defining the full manufacturing process of composite parts.

Information to be shown on the drawing

The standard also covers the information that should be indicated in technical drawings. In general engineering practice, that may include identification data, orientation or reference information, and explanatory notes needed to interpret the part correctly. For composite structures, clear graphic representation matters because the geometry and material directionality often carry functional meaning. TS EN 4408-006 supports a common drawing language for those details, helping reduce ambiguity when preforms are transferred from design intent to production documentation.

• An aerospace technical drawing standard for composite-part representation.
• It covers the representation of composite material preforms.
• It specifies information to be indicated in technical drawings.
• It supports consistent interpretation across design and manufacturing.