How to Qualify a Second U.S. CNC Supplier for an Existing Aerospace Part

#TL;DR

• Keep the U.S. CNC shops you trust and qualify another source before you urgently need it. A second approved route can add capacity and schedule flexibility while incumbent orders continue where feasible.
• Give prospective suppliers a revision-controlled transfer package covering part requirements, quantities, delivery needs, and approved processors. Confirm access rights before sharing controlled data or incumbent-owned records.
• Compare the proposed shop’s process capability, capacity, required manufacturing-site certification, and traceability against your part requirements. Similar equipment or AS9100 certification alone does not qualify the part.
• Set first-article scope under the contract and customer requirements. Identify who must approve the new site, process route, inspection results, and any additional validation.
• At Vendra, our platform and mechanical engineers assess the package, identify suitable U.S. manufacturers, and coordinate qualification work within the agreed scope.

#Why aerospace teams add a second CNC source without dropping the first

Keep the shop that already makes your part well, and qualify another U.S. CNC source before capacity becomes urgent. A trusted incumbent may handle steady orders but lack room for a program ramp. An approved second route can take added volume while you preserve the incumbent relationship and plan deliveries against both shops’ available capacity.

An excellent incumbent can still face a machine outage, staff absence, or capacity constraint. For a launch-critical part, any of those can put the schedule at risk without the shop doing anything wrong. Qualify another route before you need to use it; the new site can take production only after it meets the part requirements and clears the required approvals.

Where practical, keep repeat orders with the incumbent while the new source qualifies. Ask both shops about available capacity for planned releases, and base the delivery plan on confirmed commitments rather than assuming either shop can absorb extra volume.

#Building the transfer package the second source needs

Check who may receive the transfer package before sending files to a prospective CNC supplier. Ask your compliance team to confirm the part’s classification, contract flowdowns, permitted recipients, and approved transfer method. For ITAR-controlled work, manufacturing drawings and instructions may be technical data. U.S.-based manufacturing and data-access authorization are separate requirements.

Once access is cleared, assemble one revision-controlled RFQ package.

• Part definition: Current CAD files and drawings with the applicable revision, specifications, and any approved deviations.
• Manufacturing requirements: Material specifications, required material records, special processes, and any customer-approved processors.
• Acceptance requirements: Dimensions and tolerances, inspection criteria, required tests, and documentation the new source must deliver.
• Demand and schedule: Quote quantities, production forecasts, required delivery dates, and any planned qualification-build quantity.
• Tooling and fixtures: Existing tooling or fixture availability, ownership, and restrictions on reuse or transfer.

Check commercial and contractual rights separately from controlled-data access. Incumbent-owned fixture designs, process instructions, inspection reports, and first-article records may require permission before you share them. If you cannot share a record, tell the prospective supplier what evidence it must generate independently without disclosing the protected material.

Ask the prospective supplier to confirm the package revision and requirements before it quotes. Have it identify missing specifications, unclear acceptance criteria, and assumptions about tooling, approved processors, or documentation in its RFQ response.

#Incumbent vs. second source: what to check before you commit

Compare the incumbent’s approved manufacturing route with the proposed second source’s route before committing production work. Similar CNC equipment does not show whether a shop can meet the part’s tolerances, inspection requirements, and delivery schedule.

Before releasing production, have your engineering and quality owners identify who must approve the new site, process route, and qualification results. Check the contract for customer or program approval requirements. An AS9100 certificate addresses the quality management system. It does not approve a particular part or manufacturing route.

#Scoping first article and validation for the new source

Set the new source’s first-article scope from the contract, customer requirements, and changes in how the part will be made. Compare the proposed tooling, process route, and special-process providers with the incumbent’s approved route. Prior first-article and inspection records can help you identify risks, but they do not qualify a different manufacturing site.

When required, an AS9102 first article inspection documents how a part made by the new source meets the specified design characteristics. The IAQG standards index identifies 9102 as the standard for first article inspection requirements. Confirm the required revision, inspection scope, and acceptance authority with customer quality personnel before the qualification build.

Plan separate evidence and approval gates for changes that need additional validation. For example, a new fixture may need a trial build, while a changed special-process provider may need evidence required by the contract or customer. An accepted first-article inspection report does not replace required process validation, supplier approval, or customer approval. Your designated engineering and quality authorities should confirm which results they must accept before the new site becomes an approved production source.

#Keeping production moving during qualification

Keep incumbent repeat orders in place where feasible while the second source builds and inspects trial parts. Once you have authorized the new supplier’s access to the transfer package, set a trial quantity and schedule inspection before committing production volume. Confirm that any required special-process capacity fits the trial schedule.

Set approval gates before the trial build starts. Identify who reviews inspection results, who accepts the new process route, and whether the customer must authorize the new site before production release. Record the drawing revision used for each trial lot. If the drawing changes during qualification, have engineering assess whether the source needs another build or additional inspection.

Plan current deliveries around the incumbent’s confirmed capacity rather than assuming qualification will finish by a target date. Keep repeat-order forecasts current, and decide how much production the incumbent can cover if the second source needs another trial. Plan a contingency for additional trials or approval delays before relying on the second source for scheduled production.

#How Vendra coordinates a second-source qualification

Vendra’s platform analyzes your CAD files, drawings and manufacturing requirements, supported by mechanical engineering review. We assess the transfer package you are permitted to share and clarify missing requirements before matching the part with suitable U.S. manufacturers.

We assess manufacturers’ process capability and available capacity for the qualification build and planned production, then bring back quotes for your review. Vendra holds AS9100D certification, and we verify the selected manufacturing site’s certification and scope when your order requires it. You can see who will make the part and discuss manufacturing questions directly with the machinist.

Once you select a supplier, we coordinate the agreed trial build, inspection, documentation, and delivery through our platform. We confirm which drawing revision governs the build and which records the order must include. Your designated engineering and quality authorities decide whether the results meet acceptance requirements. Customer approval of the new site or process route remains a separate gate when the contract requires it.

For more on assessing candidates, read our U.S. aerospace CNC supplier comparison and certified CNC sourcing guide.

#FAQs

Can we reuse the incumbent’s tooling, fixtures, and inspection records? You can reuse them only if you own them or have permission to transfer and use them. Check the rights to fixture designs and records before sharing files. Prior inspection or first-article records can inform the new source’s plan, but they do not automatically qualify its parts.

Who pays for first article inspection at the new source? You and the second source should agree on cost responsibility before placing the order. Ask for the required first article inspection, any additional testing, and the resulting records to appear in the quote. We can coordinate the agreed work through Vendra.

When does adding a second source require customer approval? Your contract and program requirements determine whether the customer must approve the new manufacturing site, process route, or qualification results. Have your quality team confirm those approval gates before releasing production parts. A first article report does not replace a separate customer approval.

What determines how long qualification takes? The schedule depends on permitted access to the transfer package, tooling readiness, trial-build capacity, required inspection and testing, and the time needed for internal and customer approvals. Build those steps into the plan while you continue incumbent orders where feasible.

#Next step: scope your second-source qualification

Submit an RFQ with your transfer package, qualification quantities, target approval dates and expected production requirements. We’ll review the part requirements, identify suitable U.S. manufacturers, and scope the qualification work with you. Keep incumbent repeat orders planned while the second source moves through its required approval gates.

Submit an RFQ