# STC SA4-322

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Winslow Aerofilter Corp, United States
- Description: Full-flow oil filter 1050-B-83 with element 1A0094.
- Status date: January 1, 1960
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-806](https://openairdocs.org/tcds/A-806)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7BFD1336AD12277D862570CE006C2FC2.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-322

## ADs that name it (0)

None.

## Approved models (1)

- de Havilland Inc. (Canada) DHC-2 Series ([TCDS A-806](https://openairdocs.org/tcds/A-806))

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