# STC ST142CH

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Duncan Aviation, United States
- Description: Installation of a Bendix/King TPU66A TCAS I system.
- Status date: December 14, 1993
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A27CE](https://openairdocs.org/tcds/A27CE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/44E7C628F6721BA285256CC300035F3B.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST142CH

## ADs that name it (0)

None.

## Approved models (2)

- The Cessna Aircraft Company 501 ([TCDS A27CE](https://openairdocs.org/tcds/A27CE))
- The Cessna Aircraft Company 551 ([TCDS A27CE](https://openairdocs.org/tcds/A27CE))

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