# STC SA1545GL

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: McCoy Avionics Corp, United States
- Description: Installation of the MAC 170A frequency stability modification to King Radio Corp. KX 170A and KX 175 transceivers.
- Status date: December 4, 1991
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A13CE](https://openairdocs.org/tcds/A13CE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2BA88E6A33CBE76E85256CC100821309.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1545GL

## ADs that name it (0)

None.

## Approved models (3)

- The Cessna Aircraft Company 177 ([TCDS A13CE](https://openairdocs.org/tcds/A13CE))
- The Cessna Aircraft Company 177A ([TCDS A13CE](https://openairdocs.org/tcds/A13CE))
- The Cessna Aircraft Company 177B ([TCDS A13CE](https://openairdocs.org/tcds/A13CE))

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