# STC SA4532NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Avtech Corporation, United States
- Description: Installation of Coltech, CTD-80 ATSCALL, enabling company calling of selected aircraft via company selected radio.
- Status date: March 2, 2001
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A16WE](https://openairdocs.org/tcds/A16WE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/358E9FE4485F800785256CC2000E3D09.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4532NM

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 737 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))

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