# STC SR03474CH

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Hartzell Propeller Inc., United States
- Description: Installation of Heli-Preheat Kit, p/n TSHB407-3083-115 for 115 volt application
- Applied: October 3, 2014
- Status date: October 26, 2023
- Product: Aircraft, Rotorcraft
- Certification basis: Part 27
- Data sheets: [TCDS H2SW](https://openairdocs.org/tcds/H2SW)
- Certificate PDF: https://openairdocs.org/files/sha256/29/a8/29a803415d3022394d8cb027dd30687d25eda813cf738783c0db33a6891ad0f0
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID135760546620231031140545.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SR03474CH

## ADs that name it (0)

None.

## Approved models (1)

- Bell Helicopter Textron Canada Limited 407 ([TCDS H2SW](https://openairdocs.org/tcds/H2SW))

## What the certificate says

The certificate has no text we could read; open the PDF to read it.

## Every issue (4)

- October 26, 2023: Amended, Current. [certificate](https://openairdocs.org/files/sha256/29/a8/29a803415d3022394d8cb027dd30687d25eda813cf738783c0db33a6891ad0f0)
- November 21, 2019: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/3c/ff/3cff605e224ee2be02caff23c52e5ff814c56b69b25c85e69bec73488b9a0863)
- July 15, 2015: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/18/a6/18a60d163ce5bbc2201edd917efc8d1cf9231d7663d6944d0895aacc53262e63)
- June 29, 2015: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/20/f8/20f863248bed9f34a24c6fc55c9116ba7e42dec8a52a00da407dd78696949c46)

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