# STC SA4-398

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Serv-Aero Engineering Inc, United States
- Description: Installation of Lycoming O-435-C engine. (108-3 Landplane)
- Status date: July 10, 1975
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-767](https://openairdocs.org/tcds/A-767)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/044248C649F112D185256CC2000C5E8A.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-398

## ADs that name it (0)

None.

## Approved models (2)

- Univair Aircraft Corporation 108-2 ([TCDS A-767](https://openairdocs.org/tcds/A-767))
- Univair Aircraft Corporation 108-3 ([TCDS A-767](https://openairdocs.org/tcds/A-767))

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