# STC ST173CH

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Basler Turbo Conversions Inc., United States
- Description: Installation of cockpit blower system. (DC-3 SERIES -TP67 turbine conversion per STC SA 4840NM)
- Applied: January 7, 1993
- Status date: August 16, 1994
- Product: Aircraft, Large Airplane
- Data sheets: [TCDS A-669](https://openairdocs.org/tcds/A-669)
- Certificate PDF: https://openairdocs.org/files/sha256/1e/4b/1e4beff6234999ed8e375bb95525b7c1c51593560d32e68cfbc6e18cced16cdd
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID198599073520241030150805.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST173CH

## ADs that name it (0)

None.

## Approved models (1)

- McDonnell Douglas Corporation DC-3 Series ([TCDS A-669](https://openairdocs.org/tcds/A-669))

## What the certificate says

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

## Every issue (1)

- August 16, 1994: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/1e/4b/1e4beff6234999ed8e375bb95525b7c1c51593560d32e68cfbc6e18cced16cdd)

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