# STC SA433SO

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Bendix Corporation Avionics Div, United States
- Description: Installation of Bendix Model M4C flight control system.
- Status date: April 27, 1973
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A7CE](https://openairdocs.org/tcds/A7CE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DDC4080934B98F4785256CC2000E3BB8.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA433SO

## ADs that name it (0)

None.

## Approved models (1)

- The Cessna Aircraft Company 414 ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))

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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.