# STC SE959EA

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Agrotors, Inc, United States
- Description: Modification to higher compression ration.
- Status date: March 16, 1976
- Product: Engine
- Certification basis: Part 21
- Data sheets: [TCDS E-279](https://openairdocs.org/tcds/E-279)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7B8E98C12098145F85256CC2005C2D8F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SE959EA

## ADs that name it (0)

None.

## Approved models (2)

- Textron Lycoming AVCO Corporation VO-435-A1E ([TCDS E-279](https://openairdocs.org/tcds/E-279))
- Textron Lycoming AVCO Corporation VO-435-A1F ([TCDS E-279](https://openairdocs.org/tcds/E-279))

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.