STC SR04160CH

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SR04160CH Hartzell Propeller Inc.

One Propeller Place Piqua, OH 45356 Part 27 the Code of Federal Regulations H3WE MD Helicopters, LLC 369 (ARMY YOH-6A), 369A (ARMY OH-6A), 369H, 369HM, 369HS,369HE, 369D, 369E, 369F, 369FF Installation of Heli-Preheat Kit, p/n TA3089-1 for 115 volt application in accordance with Heli-Preheat Kit drawing TA3089-1 Revision E, dated March 6, 2023 or later FAA approved revisions and Preheat Kit Installation Instruction TNH3089 Revision D, dated August 6, 2020 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.

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) May 10, 2016 February 10, 2017 June 28, 2023 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: SR04160CH Date Amended: June 28, 2023 (Continued from Page 1: Description of Type Design Change) Installation of Heli-Preheat Kit, p/n TA3089-2 for 230 volt application in accordance with Heli-Preheat Kit drawing TA3089-2 Revision E, dated March 6, 2023 or later FAA approved revisions and Preheat Kit Installation Instruction TNH3089 Revision D, dated August 6, 2020 or later FAA approved revisions.

(Continued from Page 1: Limitations and Conditions)

3. FAA accepted Instructions for Continued Airworthiness (ICA) document # TCA1000 Revision C, dated October 5, 2022 or later FAA approved revisions, and Operating Guide document # TPG1000 Revision E, dated October 29, 2020 or later FAA approve revisions are required.

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

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