# STC SA1-93

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Reading Avn Svc Inc, United States
- Description: RCA AVQ-50 radar equipment and AVQ-50 antenna mounting bracket.
- Status date: January 1, 1961
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 2A4](https://openairdocs.org/tcds/2A4), [TCDS 6A1](https://openairdocs.org/tcds/6A1)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F60506720524C5D8862570D5006E4197.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1-93

## ADs that name it (0)

None.

## Approved models (5)

- Twin Commander Aircraft Corporation 560 ([TCDS 6A1](https://openairdocs.org/tcds/6A1))
- Twin Commander Aircraft Corporation 560-A ([TCDS 6A1](https://openairdocs.org/tcds/6A1))
- Twin Commander Aircraft Corporation 560-E ([TCDS 6A1](https://openairdocs.org/tcds/6A1))
- Twin Commander Aircraft Corporation 680 ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft Corporation 680-E ([TCDS 2A4](https://openairdocs.org/tcds/2A4))

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