# STC SA561SO

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Bendix Corporation Avionics Div, United States
- Description: Installation of Bendix M-4D automatic flight control system including optional yaw trim, optional manual electric pitch trim and optional flight director system.
- Status date: January 24, 1975
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A2PC](https://openairdocs.org/tcds/A2PC)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/90BA3E3CE8B5269885256CC200122A3E.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA561SO

## ADs that name it (0)

None.

## Approved models (3)

- Mitsubishi Heavy Industries Ltd. MU-2B-20 ([TCDS A2PC](https://openairdocs.org/tcds/A2PC))
- Mitsubishi Heavy Industries Ltd. MU-2B-25 ([TCDS A2PC](https://openairdocs.org/tcds/A2PC))
- Mitsubishi Heavy Industries Ltd. MU-2B-26 ([TCDS A2PC](https://openairdocs.org/tcds/A2PC))

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