Editorial scope guide. The points are also available as readable text below.
A material datasheet and an approved aircraft component are different things. When discussing aerospace use, identify the part specification, qualified process and acceptance evidence rather than relying on the phrase aerospace grade.
Ask what the claim actually covers
A fibre designation may describe the reinforcement, while a process specification describes how a laminate is made. Neither alone identifies the finished part’s approved application. Request the document number, revision and scope behind each qualification statement.
Keep changes under the design authority
FAA composite-structure guidance distinguishes material and process qualification from structural substantiation. Substitution should therefore be reviewed through the applicable approval process. A general carbon fiber supplier page is not evidence of aircraft certification, and this article does not claim Litian Yunde holds an aerospace approval.
Example scenario
A quotation cites a fibre manufacturer’s datasheet as evidence of aerospace suitability. Ask which finished-part and process requirements the quotation actually covers. Retain the datasheet as material information without converting it into a claim that the proposed part is approved.
Points to record
| Material reference | Identify the exact reinforcement and matrix specification. |
|---|---|
| Process reference | Record the applicable qualified manufacturing specification. |
| Part authority | Identify who approves the finished configuration and changes. |
Related reading
Background reference: FAA — AC 20-107B, Composite Aircraft Structure.
Discuss the component requirements
Send the part drawing and the requirements relevant to this guide for a scope review.
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