# STC SE4570SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Aviall of Texas, Inc, United States
- Description: Revise accessory drive spline, P/N 3008181.
- Status date: February 4, 1982
- Product: Engine
- Certification basis: Part 21
- Data sheets: [TCDS E4EA](https://openairdocs.org/tcds/E4EA)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E19858F33B32D6DC85256CC2005A7583.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SE4570SW

## ADs that name it (0)

None.

## Approved models (12)

- Pratt & Whitney Canada Inc. PT6A-135 ([TCDS E4EA](https://openairdocs.org/tcds/E4EA))
- Pratt & Whitney Canada Inc. PT6A-20 ([TCDS E4EA](https://openairdocs.org/tcds/E4EA))
- Pratt & Whitney Canada Inc. PT6A-21 ([TCDS E4EA](https://openairdocs.org/tcds/E4EA))
- Pratt & Whitney Canada Inc. PT6A-25 ([TCDS E4EA](https://openairdocs.org/tcds/E4EA))
- Pratt & Whitney Canada Inc. PT6A-27 ([TCDS E4EA](https://openairdocs.org/tcds/E4EA))
- Pratt & Whitney Canada Inc. PT6A-28 ([TCDS E4EA](https://openairdocs.org/tcds/E4EA))
- Pratt & Whitney Canada Inc. PT6A-34 ([TCDS E4EA](https://openairdocs.org/tcds/E4EA))
- Pratt & Whitney Canada Inc. PT6A-36 ([TCDS E4EA](https://openairdocs.org/tcds/E4EA))
- Pratt & Whitney Canada Inc. PT6A-38 ([TCDS E4EA](https://openairdocs.org/tcds/E4EA))
- Pratt & Whitney Canada Inc. PT6A-41 ([TCDS E4EA](https://openairdocs.org/tcds/E4EA))
- Pratt & Whitney Canada Inc. PT6A-42 ([TCDS E4EA](https://openairdocs.org/tcds/E4EA))
- Pratt & Whitney Canada Inc. PT6A-6 ([TCDS E4EA](https://openairdocs.org/tcds/E4EA))

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