# STC SA1-137

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Avionics, Inc, United States
- Description: Installation of Tactair T-3 automatic pilot and optional installation 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 1A10](https://openairdocs.org/tcds/1A10)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/052C19438C271BA685256CC1007F3B8D.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1-137

## ADs that name it (0)

None.

## Approved models (1)

- The New Piper Aircraft Inc. PA-23 Series ([TCDS 1A10](https://openairdocs.org/tcds/1A10))

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