# STC ST389CH

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Avionics Group Inc., United States
- Description: Installation of a Bendix/King CAS 81 TCAS II and Mode S transponder
- Status date: July 13, 2000
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A6WE](https://openairdocs.org/tcds/A6WE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D659A77623C7857185256CC300035FE3.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST389CH

## ADs that name it (0)

None.

## Approved models (7)

- McDonnell Douglas Corporation DC-9-11 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-12 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-13 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-14 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-15 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-15F ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-21 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))

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