# STC SA1-68

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Ohio Aviation Co, United States
- Description: Dual Wilcox ADF radio loop antenna.
- Status date: January 1, 1960
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 2A4](https://openairdocs.org/tcds/2A4)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2B903D5647BED2F7862570BD0066F407.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA1-68

## ADs that name it (0)

None.

## Approved models (1)

- Twin Commander Aircraft Corporation 680 Series ([TCDS 2A4](https://openairdocs.org/tcds/2A4))

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