# STC SR04502CH

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: HARTZELL PROPELLER LLC, USA
- Description: Installation of Heli-Preheat Kit, p/n TA3306-1 for 115 volt application in accordance with 
Heli-Preheat Kit drawing TA3306-1 Revision C, dated December 11, 2023 or later FAA approved 
revisions and Installation Instruction document # TNH3306 Revision C, dated September 30, 2021 or later FAA approved revisions
- Applied: March 3, 2020
- Status date: July 11, 2024
- Product: Aircraft, Rotorcraft
- Certification basis: Part 29
- Data sheets: [TCDS H4EU](https://openairdocs.org/tcds/H4EU)
- Certificate PDF: https://openairdocs.org/files/sha256/4f/0a/4f0a062f223dcf989265ecdc25d1d703005baec74ff4a3e97a1ccd5f82347ee2
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID146045668720240723035632.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SR04502CH

## ADs that name it (0)

None.

## Approved models (6)

- Airbus Helicopters AS332C ([TCDS H4EU](https://openairdocs.org/tcds/H4EU))
- Airbus Helicopters AS332C1 ([TCDS H4EU](https://openairdocs.org/tcds/H4EU))
- Airbus Helicopters AS332L ([TCDS H4EU](https://openairdocs.org/tcds/H4EU))
- Airbus Helicopters AS332L1 ([TCDS H4EU](https://openairdocs.org/tcds/H4EU))
- Airbus Helicopters AS332L2 ([TCDS H4EU](https://openairdocs.org/tcds/H4EU))
- Airbus Helicopters EC225LP ([TCDS H4EU](https://openairdocs.org/tcds/H4EU))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

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Original Product 7\SH&HUWLILFDWH1XPEHU Make:

SR04502CH Hartzell Propeller LLC One Propeller Place Piqua, OH 45356 Part 29 the Code of Federal Regulations H4EU Airbus Helicopters AS332C, AS332C1, AS332L, AS332L1, AS332L2, EC225LP.

Installation of Heli-Preheat Kit, p/n TA3306-1 for 115 volt application in accordance with Heli-Preheat Kit drawing TA3306-1 Revision C, dated December 11, 2023 or later FAA approved revisions and Installation Instruction document # TNH3306 Revision C, dated September 30, 2021 or later FAA approved revisions, or (See Continuation Sheet 3 of 3)

1. The installer must determine whether this design change is compatible with previously approved modifications.

(See Continuation Sheet 3 of 3) March 3, 2020 November 10, 2023 January 12, 2021 July 11, 2024 Paul (Vu) Nguyen Central Certification Branch Compliance & Airworthiness Division 3

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nited States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SR04502CH Date Amended: July 11, 2024 (Continued from Page 1: Description of Type Design Change) Installation of Engine Preheat Kit, p/n TA3306-2 for 230 volt application in accordance with Engine Preheat Kit drawing TA3306-2 Revision C, dated December 11, 2023 or later FAA approved revisions and Installation Instruction document # TNH3306 Revision C, dated September 30, 2021 or later FAA approved revisions.

(Continued from Page 1: Limitations and Conditions)

2. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission.

3. FAA accepted Instructions for Continued Airworthiness (ICA) document # TCA1000 Revision D, dated August 7, 2023 or later FAA approved revisions, and Operating Guide document # TPG1000 Revision F, dated August 7, 2023 or later FAA approved revisions are required.

4. A copy of this certificate must be maintained as part of the permanent records for the modified airplane.

- END - 33

## Every issue (1)

- July 11, 2024: Amended, Current. [certificate](https://openairdocs.org/files/sha256/4f/0a/4f0a062f223dcf989265ecdc25d1d703005baec74ff4a3e97a1ccd5f82347ee2)

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