# STC SA243NE

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Rutty John G, United States
- Description: Installation of 'anti-blocking device' in series with the microphone for ARC radio Model 300, type RT-385A.
- Status date: December 13, 1985
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A12](https://openairdocs.org/tcds/3A12)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/677688B323EFFCC285256CC200015E25.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA243NE

## ADs that name it (0)

None.

## Approved models (1)

- The Cessna Aircraft Company 172 ([TCDS 3A12](https://openairdocs.org/tcds/3A12))

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