# STC SA4-638

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Univair Aircraft Corp, United States
- Description: Single arm nose wheel fork with conventional double arm fabricated fork U415-34090-1-A and B.
- Status date: January 1, 1960
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-718](https://openairdocs.org/tcds/A-718), [TCDS A-787](https://openairdocs.org/tcds/A-787)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CCF3D3033C1E26EC862570D000789988.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-638

## ADs that name it (0)

None.

## Approved models (4)

- Univair Aircraft Corporation 415-C ([TCDS A-718](https://openairdocs.org/tcds/A-718))
- Univair Aircraft Corporation 415-CD ([TCDS A-718](https://openairdocs.org/tcds/A-718))
- Univair Aircraft Corporation 415D ([TCDS A-787](https://openairdocs.org/tcds/A-787))
- Univair Aircraft Corporation F-1 ([TCDS A-787](https://openairdocs.org/tcds/A-787))

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