# STC SA3-412

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Minneapolis-Honeywell Regulator Co., United States
- Description: MH-6-1 three-axis automatic pilot.
- Status date: January 1, 1960
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-618](https://openairdocs.org/tcds/A-618), [TCDS A-669](https://openairdocs.org/tcds/A-669)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/618FD7618A75BEB6862570CA0077615E.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3-412

## ADs that name it (0)

None.

## Approved models (2)

- McDonnell Douglas Corporation DC-3 Series ([TCDS A-618](https://openairdocs.org/tcds/A-618))
- McDonnell Douglas Corporation DC-3 Series ([TCDS A-669](https://openairdocs.org/tcds/A-669))

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