2 verified metal finishing shops in Ohio hold AS9100 certification; each fact below links to the sentence on the shop's own site.
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AS9100 extends ISO 9001 with aerospace requirements — configuration control, risk management, counterfeit-part prevention — and is expected by aerospace and defense primes.
Ask for the certificate, revision (D is current) and registrar, and whether the shop is in the OASIS database.
Each shop's verified as9100 fact is quoted from its own website; open the shop for every other capability on record.
Allen Aircraft is ISO 9001/AS9100 Certified. source
AS 9100D / ISO 9001:2015 Certified source
Fewer than three verified shops here yet — this page grows as more shops in the area are verified.