# STC SA659SO

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Bendix Corporation Avionics Div, United States
- Description: Installation of Bendix M-4C automatic flight control system,including manual electric trim,and/or installation of Bendix YD-4 yaw damper.
- Status date: November 10, 1972
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A12CE](https://openairdocs.org/tcds/A12CE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8E73D2C1C3D4F4D385256CC200569FB4.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA659SO

## ADs that name it (0)

None.

## Approved models (2)

- Raytheon Aircraft Company 60 ([TCDS A12CE](https://openairdocs.org/tcds/A12CE))
- Raytheon Aircraft Company A60 ([TCDS A12CE](https://openairdocs.org/tcds/A12CE))

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From OpenAirDocs.org, an independent open copy of FAA and NTSB data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.