# STC SA00477WI

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Compro Aviation Inc, United States
- Description: Installation of a Compro Driftfinder DFS-10 to system which injects oil into engine exhaust to produce smoke to determine wind speed and direction.
- Applied: May 30, 1995
- Status date: October 28, 1996
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A26WE](https://openairdocs.org/tcds/A26WE)
- Certificate PDF: https://openairdocs.org/files/sha256/07/05/0705c516c7365880cc446702624e2cc435bacd59186f5dcc9142118229e40d1f
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7384C9308C5B19F186257082004E7F33.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA00477WI

## ADs that name it (0)

None.

## Approved models (3)

- Weatherly Aircraft Company 620 ([TCDS A26WE](https://openairdocs.org/tcds/A26WE))
- Weatherly Aircraft Company 620A ([TCDS A26WE](https://openairdocs.org/tcds/A26WE))
- Weatherly Aircraft Company 620B ([TCDS A26WE](https://openairdocs.org/tcds/A26WE))

## What the certificate says

The certificate has no text we could read; open the PDF to read it.

## Every issue (1)

- October 28, 1996: Issued, Current. [certificate](https://openairdocs.org/files/sha256/07/05/0705c516c7365880cc446702624e2cc435bacd59186f5dcc9142118229e40d1f)

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