# STC SA4059WE

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Aerotron Aircraft Radio, Inc, United States
- Description: Installation of ground proximity warning system (GPWS) and altitude alert system.
- Status date: December 13, 1979
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A6WE](https://openairdocs.org/tcds/A6WE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0889D634E99E297585256CC2000C607B.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4059WE

## ADs that name it (0)

None.

## Approved models (1)

- McDonnell Douglas Corporation DC-9-30 Series ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))

---
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.