# STC SA1-497

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Jimmie Snodgrass and William S. Cross, United States
- Description: Franklin 4AC-176-F3 engine.
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-691](https://openairdocs.org/tcds/A-691)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DCD0346506B936E385256CC10080DB75.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA1-497

## ADs that name it (0)

None.

## Approved models (1)

- The New Piper Aircraft Inc. J3 Series ([TCDS A-691](https://openairdocs.org/tcds/A-691))

---
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.