Twisted-Wrench LLC Aircraft Maintenance Special Projects |
A supplemental type certificate (STC) is a type certificate (TC) issued when an applicant has received FAA approval to modify an aircraft 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. |
Where can I find information about STCs installed on my aircraft? If you need information about supplemental type certificates that have been installed on your aircraft, you may:
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The maintenance provider will record the installation of a STC by:
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Note The regulatory requirement for STC Permission was added to the regulations in 2006. Previously installed STCs were not exempted from this requirement. Prior to this change, a copy or the cover sheet of the STC should have been in the records with the FAA Form 337. |