# STC SA4-175

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Pan American World Airways Inc., United States
- Description: Hamilton Standard 34E60/7015-2 propellers and increase in take-off and landing weights.
- Status date: January 1, 1960
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-812](https://openairdocs.org/tcds/A-812)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/57DAFDE4760342AE862570CE0068AC19.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-175

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 377 ([TCDS A-812](https://openairdocs.org/tcds/A-812))

---
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.