# STC SA3220WE

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Honeywell International Inc., United States
- Description: Addition of filter to the cabin pressure limit control feature of P/N 103280 outflow valve. (727-223, -235, 225, -231, -227, -228, -284, -264, -295, -251)
- Status date: June 24, 1976
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/72B7F8121387739E85256CC2000A9575.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3220WE

## ADs that name it (0)

None.

## Approved models (3)

- The Boeing Company 727 ([TCDS A3WE](https://openairdocs.org/tcds/A3WE))
- The Boeing Company 727-100 Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE))
- The Boeing Company 727C Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE))

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