# STC SA4-668

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Winslow Aerofilter Corp, United States
- Description: Full flow lube oil filter 30409A with element 1A0235.
- Status date: January 1, 1960
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A13](https://openairdocs.org/tcds/3A13)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6E6B07F1A90C40B9862570D00072E093.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-668

## ADs that name it (0)

None.

## Approved models (1)

- The Cessna Aircraft Company 182 Series ([TCDS 3A13](https://openairdocs.org/tcds/3A13))

---
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.