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Supplemental Type Certificates

Variants

One-Only STC

A “One-only” STC may be issued for a particular aircraft, identified by make, model, and serial number. A one-only STC cannot be amended and the holder is not eligible for production approval. Application for a multiple STC is required for subsequent approvals of the modification.

Non-Interference STC

A non-interference, or no-hazard, STC addresses a convenience function modification that is not required by the applicable airworthiness standards. The STC Limitations and Conditions section specifies the extent, or limitation, of the modification approved by the FAA.

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This page was originally published at: https://www.faa.gov/aircraft/air_cert/design_approvals/stc/stc_variants/