# STC ST273CH

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Duncan Aviation, United States
- Description: Installation of a Collins TCAS94 TCAS II System.
- Status date: February 15, 2002
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A3EU](https://openairdocs.org/tcds/A3EU)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0597E9E709BFDDAF85256CC300035F9A.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST273CH

## ADs that name it (0)

None.

## Approved models (2)

- Raytheon Aircraft Company BAe.125 Series 800A (C-29A; U-125) ([TCDS A3EU](https://openairdocs.org/tcds/A3EU))
- Raytheon Aircraft Company Hawker 800 ([TCDS A3EU](https://openairdocs.org/tcds/A3EU))

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