# STC SP830SO

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Metropolitan Propeller Repair, Inc, United States
- Description: Vibration approval for single engine tractor installation only, on P & W Model R1340-AN-1(S3H1 or S1H1 commercial designation engines. (12D 40/6101A-10S)
- Status date: February 20, 1976
- Product: Propeller
- Certification basis: Part 21
- Data sheets: [TCDS P-257](https://openairdocs.org/tcds/P-257)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/850BAE642E3B013F85256CC200622415.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SP830SO

## ADs that name it (0)

None.

## Approved models (1)

- Hamilton Standard Division 12D ([TCDS P-257](https://openairdocs.org/tcds/P-257))

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