# STC SEW-11

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Fresno Airmotive Co, United States
- Description: Manufacture of piston pin A-56009, and piston pin and plug assembly.
- Status date: January 1, 1960
- Product: Engine
- Certification basis: Part 21
- Data sheets: TCDS 5E-1, [TCDS E-123](https://openairdocs.org/tcds/E-123)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C81089ED85367C36862570D200660500.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SEW-11

## ADs that name it (0)

None.

## Approved models (2)

- Pratt & Whitney Division R-985 Series (TCDS 5E-1)
- Pratt & Whitney Division Wasp Jr. Series ([TCDS E-123](https://openairdocs.org/tcds/E-123))

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.