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.

With a comprehensive and diverse in-house capability, S3 AeroDefense has a proven performance history that is recognized and supported by some of the world’s largest military aftermarket OEMs.

At the core of our MRO offering is our state-of-the-art in-house repair station, equipped with advanced diagnostic and test equipment, specialized tooling, and a skilled team of technicians trained to handle mission-critical components.

Established in 2011, S3’s repair station is certified under FAA, EASA, and UK CAA Part 145 regulations, enabling us to serve customers around the world with the highest standards of safety, quality, and compliance. Whether supporting flight control systems, environmental ducting, ignition components, or power generation units, S3 delivers fast turnaround times, personalized support, and dependable solutions that keep fleets flying and missions on track.

S3 AeroDefense is a leading provider of MRO services for aircraft accessories including: airborne electrical power generation, hydraulic primary flight control, landing gear, air turbine starters, rotor drive gearboxes and drivetrain components, fuel distribution, and an assortment of other mechanical, pneumatic, and hydraulic components.

At S3 AeroDefense, we take pride in the caliber of our in-house repair technicians. Our team is fully certified, licensed, and trained to perform to the highest OEM standards. We operate under FAA Repair Station #9S3R896B and hold EASA approval #145.6559, ensuring that every repair meets strict regulatory and quality benchmarks.

Many of our technicians are military veterans who bring deep experience, technical precision, and a mission-ready mindset to the work we do. Their backgrounds in service enhance our ability to deliver dependable, compliant, and cost-effective repair solutions that meet the demands of military aviation worldwide.