Spares
Authorized Military Stocking Distributor for industry-leading OEMs
Services
FAA and EASA-approved repair station offering in-house dynamic component repair
Solutions
Offering managed supply chain solutions, integrated logistics and long-term aircraft sustainment.
S3 AERODEFENSE
See us at Seoul ADEX 2025 · Booth: 7-K5
S3 AeroDefense is an award-winning provider of military aircraft spares, component repair services, and supply chain solutions to global military operators.
Milwaukee, Wisconsin, United States
Aerospace, Defense & Security
Products & Services
MRO Services
S3 Aerodefense
S3 AeroDefense offers comprehensive MRO (Maintenance, Repair, and Overhaul) solutions built on deep-rooted partnerships with industry-leading OEMs and a commitment to delivering OEM-quality results. As an authorized repair center for several top-tier manufacturers, S3 provides a full suite of services that meet or exceed factory specifications. From component-level repairs to complex overhaul programs, our MRO capabilities support critical systems across a wide range of military aircraft platforms. These trusted OEM relationships not only give us access to proprietary repair data and approved parts, but also ensure that every repair is backed by the original design authority — providing customers with confidence, traceability, and lasting performance.
OEM Spares Distribution
S3 Aerodefense
At S3 AeroDefense, we specialize in supplying high-quality spare parts at competitive prices, backed by full documentation and responsive, knowledgeable support. By leveraging our expertise and extensive global network, we provide reliable parts solutions to military operators, MROs, repair stations, and distributors around the world.
Tailored Technical Solutions
S3 Aerodefense
At S3 AeroDefense, we go beyond spares and repairs to deliver complete, customizable solutions that help our customers achieve operational readiness and long-term sustainability. From depot setup and engineering services to aircraft modernization and test stand design, our experienced team collaborates closely with stakeholders to develop programs that align with platform requirements, mission objectives, and budget realities.
People
Connect with us at
About
S3 AeroDefense is an award-winning provider of military aircraft spares, component repair services, and supply chain solutions to global military operators.
Driven by a vision to deliver cutting-edge and cost-effective solutions to military aviation aftermarket sectors worldwide, S3's global presence extends to over 55 countries on 6 continents and encompasses a wide range of support capabilities for C-130, F-16, UH-60, T-50, AH-64, CH-47, Bell 412, C-17, King Air, CN-235, and C-295 aircraft.
Driven by a vision to deliver cutting-edge and cost-effective solutions to military aviation aftermarket sectors worldwide, S3's global presence extends to over 55 countries on 6 continents and encompasses a wide range of support capabilities for C-130, F-16, UH-60, T-50, AH-64, CH-47, Bell 412, C-17, King Air, CN-235, and C-295 aircraft.
