# STC SA3-79

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Northwestern Aeronautical Co, United States
- Description: Cowl flap auxiliary actuator and cable assembly.
- Status date: January 1, 1960
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-669](https://openairdocs.org/tcds/A-669)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/57AF999FFAA0F62B862570CB005A05F4.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3-79

## ADs that name it (0)

None.

## Approved models (1)

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

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