# STC SA117NW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Alaskan Turbine S.T.O.L. Aircraft, United States
- Description: Installation of Allison 250-B17 or 250-B17B engines and related changes.
- Status date: November 8, 2000
- 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/36DB9ED67F4352CA85256CC10080DF72.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA117NW

## ADs that name it (2)

- [AD 82-12-04](https://openairdocs.org/ad/82-12-04): Combined Power Turbine and Propeller Governor Assembly · Cessna 401, 401A, 401B and 11 more. Effective Jun 7, 1982. Cited in the text
- [AD 76-16-07](https://openairdocs.org/ad/76-16-07): Engine Attachment Tangs · Allison 250-B17 or 250-B17B engines (Alaskan Turbine S.T.O.L. STC SA117NW or SA2424WE). Effective Aug 20, 1976. Named in the applicability

## Approved models (7)

- The Cessna Aircraft Company 401 ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))
- The Cessna Aircraft Company 401A ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))
- The Cessna Aircraft Company 401B ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))
- The Cessna Aircraft Company 402 ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))
- The Cessna Aircraft Company 402A ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))
- The Cessna Aircraft Company 402B ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))
- The Cessna Aircraft Company 414 ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))

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