# STC SA170SO

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Riley Turbostream Corp, United States
- Description: Auxiliary fuel system and bladder type tanks in leading edges of the wings.
- Status date: August 6, 1974
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-807](https://openairdocs.org/tcds/A-807)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9392DA8618BEE03385256CC10083CF30.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA170SO

## ADs that name it (0)

None.

## Approved models (1)

- The de Havilland Aircraft Co. Ltd (England) DH 104 Dove Series ([TCDS A-807](https://openairdocs.org/tcds/A-807))

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