# STC SA1-185

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Avionics, Inc, United States
- Description: Installation of Tactair T-3 auto- matic pilot and optional installa- tion of Tactair AH-1 altitude hold device (for use with Tactair T-3 autopilot).
- Status date: August 7, 1972
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A10](https://openairdocs.org/tcds/3A10)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/705CC2B1434FC7B485256CC1007F3BAD.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1-185

## ADs that name it (0)

None.

## Approved models (4)

- The Cessna Aircraft Company 310 ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- The Cessna Aircraft Company 310A (USAF U-3A) ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- The Cessna Aircraft Company 310B ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- The Cessna Aircraft Company 310C ([TCDS 3A10](https://openairdocs.org/tcds/3A10))

---
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.