--- title: Searching for STCs description: TBX makes it extremely easy to search through the FAA Supplemental Type Certificate (STC) database by description/keyword, make/model, STC#, or Holder. --- [Skip to content](https://help.airworthy.com/searching-for-stcs#main-content) English Show submenu for translations ![TBX](https://help.airworthy.com/hs-fs/hubfs/TBX-Logo-2024-midnightBlue.png?width=100&height=21&name=TBX-Logo-2024-midnightBlue.png) Open main navigation Close main navigation - English Show submenu for translations - [Contact us](mailto:support@airworthy.com) [Contact us](mailto:support@airworthy.com) How can we help you? - There are no suggestions because the search field is empty. 1. [TBX Knowledge Base](https://help.airworthy.com/?hsLang=en) 2. [FAA Data & Library](https://help.airworthy.com/faa-data-library?hsLang=en) 3. [Supplemental Type Certificates (STCs)](https://help.airworthy.com/faa-data-library?hsLang=en#supplemental-type-certificates-stcs) November 17, 2025 # Searching for STCs ## TBX allows users to search for STCs by holder, STC#, Description, or make and model A supplemental type certificate (STC) is a type certificate (TC) issued when an applicant has received FAA approval to modify an aeronautical product from its original design.  The STC, which incorporates by reference the related TC, approves not only the modification but also how that modification affects the original design. TBX makes it easy to search through the approved STC holders. 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