# STC SA4-167

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Winslow Aerofilter Corp, United States
- Description: Aerofilter 1050-B-83 full flow filter with element 1A0094.
- Status date: January 1, 1960
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-757](https://openairdocs.org/tcds/A-757), [TCDS A-765](https://openairdocs.org/tcds/A-765)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2735CAC99B393C97862570CE006C3474.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-167

## ADs that name it (0)

None.

## Approved models (2)

- Raytheon Aircraft Company C-45 Series ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Raytheon Aircraft Company C18 Series ([TCDS A-757](https://openairdocs.org/tcds/A-757))

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