# STC SA1-445

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Southern Ohio Avn Co, United States
- Description: ARC Type A13-B VHF navigational antenna on vertical fin.
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 2A4](https://openairdocs.org/tcds/2A4), [TCDS 6A1](https://openairdocs.org/tcds/6A1)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/976ED102C1F44FC785256CC10080DB51.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1-445

## ADs that name it (0)

None.

## Approved models (3)

- Twin Commander Aircraft Corporation 500 ([TCDS 6A1](https://openairdocs.org/tcds/6A1))
- Twin Commander Aircraft Corporation 560 ([TCDS 6A1](https://openairdocs.org/tcds/6A1))
- Twin Commander Aircraft Corporation 680 ([TCDS 2A4](https://openairdocs.org/tcds/2A4))

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.