Supplemental Type Certificate (STC) 14 CFR Part 21, Subpart E
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Sofema Aviation Services (SAS) considers key features of the FAA STC Process Introduction The Supplemental Type Certificate (STC) process is a critical regulatory mechanism ensuring that modifications to type-certified products are safe, effective, and compliant with FAA standards. Each participant—from the applicant to the FAA, STC holders, and aircraft operators—has specific roles and responsibilities in ensuring…

