# STC SA439WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Western Commander, Inc, United States
- Description: Lycoming IGSO-480-A1D6 engines in lieu of original GSO-480-B1A6.
- Status date: November 4, 1970
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 2A4](https://openairdocs.org/tcds/2A4)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/83916366DB97E93685256CC2000E3C37.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA439WE

## ADs that name it (0)

None.

## Approved models (1)

- Twin Commander Aircraft Corporation 680 Series ([TCDS 2A4](https://openairdocs.org/tcds/2A4))

---
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.