# STC ST242CH

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: ElectroSonics Div of AiRadio Corporation, United States
- Description: Installation of Sundstrand Mark VI Ground Proximity Warning System.
- Status date: August 17, 1994
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A9NM](https://openairdocs.org/tcds/A9NM)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3326463F7E311CD385256CC300035F88.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST242CH

## ADs that name it (0)

None.

## Approved models (1)

- The Cessna Aircraft Company 650 ([TCDS A9NM](https://openairdocs.org/tcds/A9NM))

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