# STC SA494NW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Wellborn, Paul, United States
- Description: Installation of Cessna 150 exhaust system with one inch cowling extension
- Applied: April 25, 1977
- Status date: August 9, 1977
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A-694](https://openairdocs.org/tcds/A-694)
- Certificate PDF: https://openairdocs.org/files/sha256/b5/96/b59678a0dce693568e7a77476a2e0c53132d3f5f88375022dc92ac11376c9b74
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2B6BDE54FB4BFD8886257A450049F66F.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA494NW

## ADs that name it (0)

None.

## Approved models (1)

- Don Luscombe Aviation History Foundation Inc. 8B ([TCDS A-694](https://openairdocs.org/tcds/A-694))

## What the certificate says

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

## Every issue (1)

- August 9, 1977: Issued, Current. [certificate](https://openairdocs.org/files/sha256/b5/96/b59678a0dce693568e7a77476a2e0c53132d3f5f88375022dc92ac11376c9b74)

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