STC SR04347CH

United States of America Department of Transportation Federal Aviation Administration VNNISTARTO Supplemental Type Certificate Number: SR04347CH This certificate issued to: Hartzell Propeller LLC One Propeller Place Piqua, OH 45356 Part 27 of the Code of Federal Regulations.

Original Product Make: MD Helicopters LLC Type Certificate Number: H19NM Model: MD900, MD900 (902 Configuration) Description of Type Design Change:

Installation of Heli-Preheat Kit, p/n TA3195-1 for 115 volt application in accordance with Heli-Preheat Kit drawing TA3195-1 Revision D, dated November 22, 2023 or later FAA approved revisions and Preheat Kit Installation Instruction TNH3195 Revision C, dated August 31, 2018 or later FAA approved revisions, or installation of (See Continuation Sheet 3 of 3) Limitations and Conditions:

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.

Date of Application: July 21, 2017 Date Reissued: November 10, 2023 Date of Issuance: October 1, 2018 Date Amended: March 25, 2024 By Direction of the Administrator Signature:

Paul (Vu) Nguyen Title: Central Certification Branch Compliance & Airworthiness Division

47. The ST's supporting documentation (drawings, instructions, specifications, flight manual supplements, etc.) is the property of the STC holder. 14 CFR 21,120).

FEDERAL AVIATION United States of America Department of Transportation Federal Aviation Administration TAIN STRAT O Supplemental Type Certificate (Continuation Sheet) Number: SR04347CH Date Amended: March 25, 2024 (Continued from Page 1: Description of Type Design Change) Heli-Preheat Kit, p/n TA3195-2 for 230 volt application in accordance with Heli-Preheat Kit drawing TA3195-2 Revision D, dated November 22, 2023 or later FAA approved revisions, and Preheat Kit Installation Instruction TNH3195 Revision C, dated August 31, 2018, 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 airplane.

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