# STC SA173NW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Joppa, Robert G., United States
- Description: Installation of a trailing (cone) airspeed static pressure source
- Applied: April 4, 1975
- Status date: April 21, 1975
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 3A13](https://openairdocs.org/tcds/3A13)
- Certificate PDF: https://openairdocs.org/files/sha256/68/f3/68f35371a9de8fbf4164b984755399e4c2f53b6010b310b3ddba60911fee0dd4
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E68358065EFF03B586257AE100570235.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA173NW

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company 182J ([TCDS 3A13](https://openairdocs.org/tcds/3A13))

## What the certificate says

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

## Every issue (1)

- April 21, 1975: Issued, Current. [certificate](https://openairdocs.org/files/sha256/68/f3/68f35371a9de8fbf4164b984755399e4c2f53b6010b310b3ddba60911fee0dd4)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.