# STC SA4-500

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Dow-Elco Inc, United States
- Description: Engine mount core assemblies. (Parts manufactured under license from United Aircraft Corporation.)
- Status date: January 1, 1960
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 6A6](https://openairdocs.org/tcds/6A6), [TCDS A-793](https://openairdocs.org/tcds/A-793)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/375B6FC8156A6375862570D00054DE2F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-500

## ADs that name it (0)

None.

## Approved models (3)

- Tracor Flight Systems Inc. 240 Series ([TCDS A-793](https://openairdocs.org/tcds/A-793))
- Tracor Flight Systems Inc. 340 ([TCDS 6A6](https://openairdocs.org/tcds/6A6))
- Tracor Flight Systems Inc. 440 Military C-131E ([TCDS 6A6](https://openairdocs.org/tcds/6A6))

---
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.