# STC SA392SO

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Piedmont Aviation Inc, United States
- Description: Install Goodyear 9543138 wheels in place of Goodyear 9540512.
- Status date: January 1, 1960
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 1A7](https://openairdocs.org/tcds/1A7)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/12A9C87BDC987FF8862570CF0078D33F.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA392SO

## ADs that name it (0)

None.

## Approved models (1)

- Martin-Marietta Corporation 404 ([TCDS 1A7](https://openairdocs.org/tcds/1A7))

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