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.
Recorded modification
What the FAA record covers
Installation of Jacobs Model R-755-9, -A2 or B2 engine with Hamilton Std 2B20/6135-15 propellers.
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
Confirm before sourcing
- 01Does it cover the exact Boeing Airplane Wichita Division 75 (Army PT-13) and Boeing Airplane Wichita Division A75 (Army PT-13A; -13B; -13C), and 7 more aircraft configurations model, serial range, and configuration?
- 02Which powerplant configuration, limits, instruments, and maintenance data apply?
- 03Who can legally supply the design data, kit, instructions, and ICAs?
- 04What parts, labor, conformity, and return-to-service work are excluded?
Related engine and powerplant STCs
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Installation of Pratt & Whitney R985-AN-1 Engine, Hamilton Standard 2D30/6101A-12 Propeller; B75N1 (Navy N2S-3), N450V, S/N 75-6484.
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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