# STC SE157EA

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Aircraft Supplies, United States
- Description: Modification of AS-5999 to incorporate the use of flat sides.
- Status date: January 1, 1960
- Product: Engine
- Certification basis: Part 21
- Data sheets: [TCDS E-186](https://openairdocs.org/tcds/E-186)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DE85EAB0860E4455862570D20069096F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SE157EA

## ADs that name it (0)

None.

## Approved models (1)

- Pratt & Whitney Division Twin Wasp S1C3-G ([TCDS E-186](https://openairdocs.org/tcds/E-186))

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