STC SA4974NM

FAA DRS lists SA4974NM as Current · Amended, held by Radial Engines Ltd, for Boeing Airplane Wichita Division 75 (Army PT-13), Boeing Airplane Wichita Division A75 (Army PT-13A; -13B; -13C), and Boeing Airplane Wichita Division A75J1 (Army PT-18), and 6 more aircraft configurations. Recorded change: Installation of Jacobs Model R-755-9, -A2 or B2 engine with Hamilton Std 2B20/6135-15 propellers. Snapshot dated June 30, 2026.

FAA-listed holder

Radial Engines Ltd

Aircraft configurations

FAA revision date

May 1, 2008

FAA status

Current · Amended

Recorded modification

What the FAA record covers

SA4974NM identifies the approval, recorded holder, named aircraft, and modification scope. It does not confirm kit availability, serial-number effectivity, data rights, price, or installation authority.

Applicability

Aircraft named in FAA DRS

Named aircraft: Boeing Airplane Wichita Division 75 (Army PT-13), Boeing Airplane Wichita Division A75 (Army PT-13A; -13B; -13C), and Boeing Airplane Wichita Division A75J1 (Army PT-18), and 6 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Buyer checks

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ST04187NYEngine and powerplantRevised Dec 23, 2025

Installation of of Enode Engine Data Acquisition Unit & Ionode Digital Data Recorder.

FAA holder: Aerospace Design & Compliance LLC.

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SA02216SEEngine and powerplantRevised Nov 20, 2025

Removal of mechanical link between engine throttle control and propeller RPM control. Installation of a separate RPM control lever, linkage between Cirrus RPM cable/cam followers, center console to accommodate three-lever configuration, new knobs for all levers, and new installation hardware (nuts, bolts, etc).

FAA holder: Skyryse Inc.

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SA1299WEEngine and powerplantRevised Nov 8, 2025

Installation of Pratt & Whitney R985-AN-1 Engine, Hamilton Standard 2D30/6101A-12 Propeller; B75N1 (Navy N2S-3), N450V, S/N 75-6484.

FAA holder: AvComp, LLC

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SA1540WEEngine and powerplantRevised Nov 8, 2025

Installation of Pratt & Whitney R-985-AN-1, -AN-3, -AN14B, or -AN14BM engine, Hamilton Standard 2D30/6101A-12 or 2D30/6101A-12 or 22D30/6533A-12 propeller, modified fuel and oil systems.

FAA holder: AvComp LLC

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What the FAA record covers

Aircraft named in FAA DRS

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Related engine and powerplant STCs

Installation of of Enode Engine Data Acquisition Unit & Ionode Digital Data Recorder.

Installation of Pratt & Whitney R985-AN-1 Engine, Hamilton Standard 2D30/6101A-12 Propeller; B75N1 (Navy N2S-3), N450V, S/N 75-6484.

Installation of Pratt & Whitney R-985-AN-1, -AN-3, -AN14B, or -AN14BM engine, Hamilton Standard 2D30/6101A-12 or 2D30/6101A-12 or 22D30/6533A-12 propeller, modified fuel and oil systems.