# STC SA170NW

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Sorm Industries, United States
- Description: Installation of bulk fluid cargo tank
- Applied: April 1, 1975
- Status date: October 22, 1975
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A9EA](https://openairdocs.org/tcds/A9EA)
- Certificate PDF: https://openairdocs.org/files/sha256/f6/e5/f6e50b2dc7826865fc78082fbc4636ec934169c1cab1b5c1ba599d018e1eb9e5
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/06FB464F674AED9686257AD300724D30.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA170NW

## ADs that name it (0)

None.

## Approved models (1)

- Viking Air Limited DHC-6-300 ([TCDS A9EA](https://openairdocs.org/tcds/A9EA))

## What the certificate says

The certificate is a scan without a text layer; open the PDF to read it.

## Every issue (1)

- October 22, 1975: Amended, Current. [certificate](https://openairdocs.org/files/sha256/f6/e5/f6e50b2dc7826865fc78082fbc4636ec934169c1cab1b5c1ba599d018e1eb9e5)

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From OpenAirDocs.org, an independent open copy of FAA and NTSB data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.