# STC SA673NW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Schemm, Herman, United States
- Description: Installation of a McCauley propeller on a Continental engine
- Applied: August 15, 1978
- Status date: October 2, 1978
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A-768](https://openairdocs.org/tcds/A-768)
- Certificate PDF: https://openairdocs.org/files/sha256/f4/34/f43492dca98f28b802322a5db3e1b5c0fb4ed28043262f9f09c758823ad10131
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4FF8079EF743B1CC86257A410066B65D.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA673NW

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company 120 ([TCDS A-768](https://openairdocs.org/tcds/A-768))

## What the certificate says

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

## Every issue (1)

- October 2, 1978: Issued, Current. [certificate](https://openairdocs.org/files/sha256/f4/34/f43492dca98f28b802322a5db3e1b5c0fb4ed28043262f9f09c758823ad10131)

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