# STC SA00569WI

- 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 A17SW](https://openairdocs.org/tcds/A17SW)
- Certificate PDF: https://openairdocs.org/files/sha256/ed/d7/edd7481ea08b78bd950f1f8b99a10d3eb0c24d6212475ab5fa34929b264d22a0
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/718DE9B3572007828625708200503519.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA00569WI

## ADs that name it (0)

None.

## Approved models (11)

- Air Tractor Inc. AT-401 ([TCDS A17SW](https://openairdocs.org/tcds/A17SW))
- Air Tractor Inc. AT-401A ([TCDS A17SW](https://openairdocs.org/tcds/A17SW))
- Air Tractor Inc. AT-401B ([TCDS A17SW](https://openairdocs.org/tcds/A17SW))
- Air Tractor Inc. AT-402 ([TCDS A17SW](https://openairdocs.org/tcds/A17SW))
- Air Tractor Inc. AT-402A ([TCDS A17SW](https://openairdocs.org/tcds/A17SW))
- Air Tractor Inc. AT-501 ([TCDS A17SW](https://openairdocs.org/tcds/A17SW))
- Air Tractor Inc. AT-502 ([TCDS A17SW](https://openairdocs.org/tcds/A17SW))
- Air Tractor Inc. AT-502A ([TCDS A17SW](https://openairdocs.org/tcds/A17SW))
- Air Tractor Inc. AT-502B ([TCDS A17SW](https://openairdocs.org/tcds/A17SW))
- Air Tractor Inc. AT-503 ([TCDS A17SW](https://openairdocs.org/tcds/A17SW))
- Air Tractor Inc. AT-503A ([TCDS A17SW](https://openairdocs.org/tcds/A17SW))

## 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/ed/d7/edd7481ea08b78bd950f1f8b99a10d3eb0c24d6212475ab5fa34929b264d22a0)

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From OpenAirDocs.org, an independent open copy of FAA and NTSB data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.