# STC SR03168CH

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Hartzell Propeller LLC, United States
- Description: Installation of Heli-Preheat System, P/N TA2584-1 for 115 volt application
- Applied: August 6, 2012
- Status date: November 13, 2025
- Product: Aircraft, Rotorcraft
- Certification basis: Part 27
- Data sheets: [TCDS R00003RD](https://openairdocs.org/tcds/R00003RD)
- Certificate PDF: https://openairdocs.org/files/sha256/2a/57/2a57892a6ca0accca61aed4881a4644d63b5e32b344011c98b2121e64971ca69
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID194080413220251124165419.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SR03168CH

## ADs that name it (0)

None.

## Approved models (1)

- Bell Helicopter Textron Canada Limited 429 ([TCDS R00003RD](https://openairdocs.org/tcds/R00003RD))

## 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.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number 

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Original Product 7\SH&HUWLILFDWH1XPEHU Make:

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artzell Propeller LLC One Propeller Place Piqua, OH 45356 Part 27 the Code of Federal Regulations Bell Textron Canada Limited 429 R00003RD Installation of Heli-Preheat Kit, p/n TA2584-1 for 115 volt application in accordance with Heli-Preheat Kit drawing TA2584-1 Revision K, dated January 23rd, 2024 or later FAA approved revisions and Preheat Kit Installation Instruction TNH2584 Revision E, dated November 7th, 2023 or later approved revisions, or installation of

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

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.

(See Continuation Sheet 3 of 3) 8/6/12 5/13/15 11/10/23 11/13/25 11/21/12 3/25/24 Bo R. Landess STC ODA administrator Hartzell Propeller ODA-100082-CE 3

(Continuation Sheet) Number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ontinued from Page 1: Description of Type Design Change)

Heli-Preheat Kit, p/n TA2584-2 for 230 volt application in accordance with Heli-Preheat Kit drawing TA2584-2 Revision J, dated December 11th, 2023 or later FAA approved revisions, and Preheat Kit Installation Instruction TNH2584 Revision E, dated November 7th, 2023, or later FAA approved revisions.

(Continued from Page 1: Limitations and Conditions)

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 rotorcraft.

- END - 33 11/13/25

## Every issue (4)

- November 13, 2025: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/2a/57/2a57892a6ca0accca61aed4881a4644d63b5e32b344011c98b2121e64971ca69)
- March 25, 2024: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/c7/95/c7951098b2abade95661755a4c44d01fee0f730c2de5502c4b820a9be296099e)
- May 13, 2015: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/a2/74/a274295abfdf5c1f48259ccfcd2db65dde78c7d79546f6b3da9e69a127a80119)
- November 21, 2012: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/0e/f4/0ef4d9e1b005104686a1b56f51fcca0aa41ebf4cd09cbb2c64a2c6d35508473f)

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