# STC SA00568WI

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Compro Aviation Inc, United States
- Description: Installation of a Compro Aviation Driftfinder DFS-10 system which injects oil into engine exhaust to produce smoke that determines wind speed and direction.
- Applied: May 30, 1995
- Status date: September 4, 1997
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A9SW](https://openairdocs.org/tcds/A9SW)
- Certificate PDF: https://openairdocs.org/files/sha256/e3/10/e310511ada31f866b4d8b30307cd785f6d98ffff5c6c375bd2af73c4289f6a59
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0F836719FED372FE86257082004FF730.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA00568WI

## ADs that name it (0)

None.

## Approved models (3)

- Air Tractor Inc. AT-301 ([TCDS A9SW](https://openairdocs.org/tcds/A9SW))
- Air Tractor Inc. AT-400 ([TCDS A9SW](https://openairdocs.org/tcds/A9SW))
- Air Tractor Inc. AT-400A ([TCDS A9SW](https://openairdocs.org/tcds/A9SW))

## What the certificate says

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

## Every issue (1)

- September 4, 1997: Issued, Current. [certificate](https://openairdocs.org/files/sha256/e3/10/e310511ada31f866b4d8b30307cd785f6d98ffff5c6c375bd2af73c4289f6a59)

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