# STC SA20NW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Leach, Franklin E., United States
- Description: Installation of a Lycoming O-360-A1A engine and a Hartzell propeller
- Applied: November 6, 1972
- Status date: December 29, 1972
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 3A17](https://openairdocs.org/tcds/3A17)
- Certificate PDF: https://openairdocs.org/files/sha256/c3/73/c37331c635f6a26d0e33afb5693f9a825c46b12acceddeeead687e7436ed7c5e
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/990E34C98566671B86257AE100644011.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA20NW

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company 175 ([TCDS 3A17](https://openairdocs.org/tcds/3A17))

## What the certificate says

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

## Every issue (1)

- December 29, 1972: Issued, Current. [certificate](https://openairdocs.org/files/sha256/c3/73/c37331c635f6a26d0e33afb5693f9a825c46b12acceddeeead687e7436ed7c5e)

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