# STC SA3404SO

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Appalachian Accessories, United States
- Description: Installation of Appalachian stainless steel brake disks.
- Status date: April 30, 1992
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A18SO](https://openairdocs.org/tcds/A18SO), [TCDS A1CE](https://openairdocs.org/tcds/A1CE), [TCDS A30CE](https://openairdocs.org/tcds/A30CE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/477D86EF3AF919A485256CC2000A97B7.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3404SO

## ADs that name it (0)

None.

## Approved models (7)

- Raytheon Aircraft Company 77 ([TCDS A30CE](https://openairdocs.org/tcds/A30CE))
- Raytheon Aircraft Company A24R ([TCDS A1CE](https://openairdocs.org/tcds/A1CE))
- Raytheon Aircraft Company B19 ([TCDS A1CE](https://openairdocs.org/tcds/A1CE))
- Raytheon Aircraft Company B24R ([TCDS A1CE](https://openairdocs.org/tcds/A1CE))
- Raytheon Aircraft Company C23 ([TCDS A1CE](https://openairdocs.org/tcds/A1CE))
- Raytheon Aircraft Company C24R ([TCDS A1CE](https://openairdocs.org/tcds/A1CE))
- The New Piper Aircraft Inc. PA-38-112 ([TCDS A18SO](https://openairdocs.org/tcds/A18SO))

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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.