# STC SA4-391

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Whitaker Art, United States
- Description: Fiberglass wheel fenders.
- Status date: January 1, 1961
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 1A6](https://openairdocs.org/tcds/1A6)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/50ADD302EFCDB232862570D60052521A.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA4-391

## ADs that name it (0)

None.

## Approved models (1)

- The New Piper Aircraft Inc. PA-22 Series ([TCDS 1A6](https://openairdocs.org/tcds/1A6))

---
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.