TS EN 9103/AC

TS EN 9103/AC is an AC document based on EN 9103:2014/AC for the aerospace sector, focused on managing the variation of key characteristics across the supply chain. The technical issue is not general quality control alone, but the controlled handling of product characteristics that can materially affect fit, function, performance, or reliability when they drift out of control.

Key characteristics in the aerospace context

In general engineering terms, key characteristics are product features whose variation has a disproportionate impact on downstream requirements. In aerospace manufacture, those features are commonly associated with critical dimensions, interfaces, or process outcomes that need disciplined variation control. The broader concept behind this standard family is to link product definition, process capability, and ongoing management into a traceable variation management programme.

Where the document applies

• It is primarily intended for new parts and products, but it can also be applied to parts already in production.
• It applies to production processes that influence variation of KCs, and to maintenance processes where KCs are identified.
• It covers assemblies, all part levels within an assembly, and basic materials including castings and forgings.
• It applies to organizations responsible for producing the design characteristics of the product, as well as subcontractors involved in those characteristics.
• It does not apply to laboratory-scale, pilot, or pre-production processes, although alternative management methods may be used in those phases when required by the customer or judged appropriate by the organization.
• Producers and subcontractors are responsible for flowing the applicable revision down to subcontractors and for ensuring KC conformity to customer requirements.

As an AC publication, this listing should be read as a correction/addition tied to the underlying EN 9103 reference rather than as a standalone full requirements standard. Its value is in clarifying how variation management for key characteristics is handled within aerospace quality management systems.