# STC ST00237AT

- Type: Supplemental type certificate
- Status: Current, Surrendered
- Holder: TIMCO, United States
- Description: Installation of Dual Honeywell Mode S transponders.
- Applied: March 16, 1993
- Status date: December 29, 2008
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 4A25](https://openairdocs.org/tcds/4A25)
- Certificate PDF: https://openairdocs.org/files/sha256/d0/83/d0839a9f2420aea6aebae33da2cc4e5399aa984f1b6e5f8c39b6519dbdfeeb5c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A2C3DFFF047BD2778625756D00742A03.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST00237AT

## ADs that name it (0)

None.

## Approved models (1)

- McDonnell Douglas Corporation DC-8-72 ([TCDS 4A25](https://openairdocs.org/tcds/4A25))

## What the certificate says

The certificate is a scan without a text layer; open the PDF to read it.

## Every issue (1)

- December 29, 2008: Surrendered, Current. [certificate](https://openairdocs.org/files/sha256/d0/83/d0839a9f2420aea6aebae33da2cc4e5399aa984f1b6e5f8c39b6519dbdfeeb5c)

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