# STC SA4465NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Serv-Aero Engineering Inc, United States
- Description: Installation of speed ring. (S2R-R1820 S/N R1820-001DC AND UP)
- Status date: September 29, 1982
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A4SW](https://openairdocs.org/tcds/A4SW)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D62346C6354E250185256CC2000E3C9E.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4465NM

## ADs that name it (0)

None.

## Approved models (2)

- Ayres Corporation S2R ([TCDS A4SW](https://openairdocs.org/tcds/A4SW))
- Ayres Corporation S2R-R1820 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW))

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