# STC SA4-656

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Winslow Aerofilter Corp, United States
- Description: Aerofilter 30816A with element1A0097.
- Status date: January 1, 1960
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS AL-2](https://openairdocs.org/tcds/AL-2)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D68A28A3A0F4B6D8862570D000762ED9.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-656

## ADs that name it (0)

None.

## Approved models (7)

- S and R Aviation Services Inc Army B-25C ([TCDS AL-2](https://openairdocs.org/tcds/AL-2))
- S and R Aviation Services Inc Army B-25G ([TCDS AL-2](https://openairdocs.org/tcds/AL-2))
- S and R Aviation Services Inc Army B-25H ([TCDS AL-2](https://openairdocs.org/tcds/AL-2))
- S and R Aviation Services Inc Army B-25J ([TCDS AL-2](https://openairdocs.org/tcds/AL-2))
- S and R Aviation Services Inc Army B-25N ([TCDS AL-2](https://openairdocs.org/tcds/AL-2))
- S and R Aviation Services Inc Army RB-25 ([TCDS AL-2](https://openairdocs.org/tcds/AL-2))
- S and R Aviation Services Inc Army TB-25N ([TCDS AL-2](https://openairdocs.org/tcds/AL-2))

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