# STC SA4-925

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Clarkson Company, United States
- Description: Magnetic flight director 2000.
- Status date: January 1, 1960
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 1A3](https://openairdocs.org/tcds/1A3), [TCDS 3A12](https://openairdocs.org/tcds/3A12), [TCDS 3A13](https://openairdocs.org/tcds/3A13), [TCDS 3A17](https://openairdocs.org/tcds/3A17), [TCDS 3A19](https://openairdocs.org/tcds/3A19), [TCDS 5A6](https://openairdocs.org/tcds/5A6), [TCDS A-799](https://openairdocs.org/tcds/A-799), [TCDS 2A3](https://openairdocs.org/tcds/2A3), [TCDS 2A1](https://openairdocs.org/tcds/2A1), [TCDS A-782](https://openairdocs.org/tcds/A-782), [TCDS 1A10](https://openairdocs.org/tcds/1A10), [TCDS 1A15](https://openairdocs.org/tcds/1A15), [TCDS 1A6](https://openairdocs.org/tcds/1A6), [TCDS 3A15](https://openairdocs.org/tcds/3A15), [TCDS 3A16](https://openairdocs.org/tcds/3A16), [TCDS A-777](https://openairdocs.org/tcds/A-777)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D34D3DA5BA695885862570D10051FE6F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-925

## ADs that name it (0)

None.

## Approved models (17)

- Bellanca Aircraft Corporation 14-19 Series ([TCDS 1A3](https://openairdocs.org/tcds/1A3))
- Mooney Aircraft Corporation M20 Series ([TCDS 2A3](https://openairdocs.org/tcds/2A3))
- Multitech Engineering Corporation D-16 ([TCDS 2A1](https://openairdocs.org/tcds/2A1))
- Multitech Engineering Corporation D-16A ([TCDS 2A1](https://openairdocs.org/tcds/2A1))
- Navion Aircraft Company Ltd. Navion Series ([TCDS A-782](https://openairdocs.org/tcds/A-782))
- Raytheon Aircraft Company 35 Series ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Raytheon Aircraft Company 35 Series ([TCDS A-777](https://openairdocs.org/tcds/A-777))
- Raytheon Aircraft Company 95 Series ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- The Cessna Aircraft Company 150 ([TCDS 3A19](https://openairdocs.org/tcds/3A19))
- The Cessna Aircraft Company 170 ([TCDS A-799](https://openairdocs.org/tcds/A-799))
- The Cessna Aircraft Company 172 ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 175 ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- The Cessna Aircraft Company 180 ([TCDS 5A6](https://openairdocs.org/tcds/5A6))
- The Cessna Aircraft Company 182 ([TCDS 3A13](https://openairdocs.org/tcds/3A13))
- The New Piper Aircraft Inc. PA-22 Series ([TCDS 1A6](https://openairdocs.org/tcds/1A6))
- The New Piper Aircraft Inc. PA-23 Series ([TCDS 1A10](https://openairdocs.org/tcds/1A10))
- The New Piper Aircraft Inc. PA-24 Series ([TCDS 1A15](https://openairdocs.org/tcds/1A15))

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