STC SE12225AC

SE12225AC High Cotton Aircraft Conversions, LLC 6776 E Highland Dr.

Jonesboro, AR 72401 * * * See AML SE12225AC See AML SE12225AC See AML SE12225AC

1. The installer must determine whether this design change is compatible with previously approved modifications. 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) 12/06/2023 09/14/2026 11/25/2025 for Jason Deutschman Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 3 This STC will incorporate P&W 1700 rpm propeller reduction gearbox on P&WC engines to allow 1700 rpm propeller installation per FAA Approved Model List (AML) No. SE12225A dated November 11, 2025, or later FAA approved revision.

FAA 8110-2 ( 10/24) Page 2 of __

SE12225AC 09/14/2026 3

SE12225AC 09/14/2026 Limitations and Conditions (continued):

2. The following Assembly, Installation and Maintenance Data is required:

a) Applicable Document: 6400002 Rev 5 dated Sept 22, 2025, Engine Kit Design Data, Assembly, PT6A-41, -41AG, -42, -43 MAX, or later accepted revisions.

b) Applicable Document: 6500001 Rev 4 dated Jul 5, 2025, Installation and Maintenance Instructions ENGINE, PT6A-41, -41AG, -42, -43 MAX, or later accepted revisions.

c) Applicable Document: 6500005 Rev IR dated Sept 2, 2025, Instructions for Continued Airworthiness, ICA ENGINE, PT6A-41 MAX, -41AG MAX, -42 MAX, -43 MAX, or later accepted revisions.

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