# STC SE474NE

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Raymond Ives, United States
- Description: Installation of 'Auto-Vac-2' auxiliary vacuum system.
- Status date: April 4, 1988
- Product: Engine
- Certification basis: Part 21
- Data sheets: [TCDS 1E10](https://openairdocs.org/tcds/1E10)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9D4B638E83E4F54385256CCB0060197F.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SE474NE

## ADs that name it (0)

None.

## Approved models (5)

- Textron Lycoming AVCO Corporation IO-360-A1B6 ([TCDS 1E10](https://openairdocs.org/tcds/1E10))
- Textron Lycoming AVCO Corporation IO-360-A1B6D ([TCDS 1E10](https://openairdocs.org/tcds/1E10))
- Textron Lycoming AVCO Corporation IO-360-B1E ([TCDS 1E10](https://openairdocs.org/tcds/1E10))
- Textron Lycoming AVCO Corporation IO-360-C1C ([TCDS 1E10](https://openairdocs.org/tcds/1E10))
- Textron Lycoming AVCO Corporation IO-360-C1C6 ([TCDS 1E10](https://openairdocs.org/tcds/1E10))

---
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.