# STC SA998NW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: North Sound Aviation, United States
- Description: Installation of a McCauley 2A34C22N/S84SF-6 propeller and a McCauley D-4101 spinner on a Franklin 6A-350-C2 engine
- Applied: June 18, 1980
- Status date: October 7, 1980
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 3A12](https://openairdocs.org/tcds/3A12)
- Certificate PDF: https://openairdocs.org/files/sha256/86/cb/86cbf59cb7c798a2573411cb715db8c9f7412624e7f2df892457205f516f0efc
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6FDC5F758767ED0986257A08004DCF07.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA998NW

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company 172G ([TCDS 3A12](https://openairdocs.org/tcds/3A12))

## What the certificate says

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

## Every issue (1)

- October 7, 1980: Issued, Current. [certificate](https://openairdocs.org/files/sha256/86/cb/86cbf59cb7c798a2573411cb715db8c9f7412624e7f2df892457205f516f0efc)

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