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Specialized Aircraft Accessory Repair
& Refurbishment Services

State-of-the-art facilities, thorough inspection and assembly, and rigorous quality systems ensure every component meets the highest standards.

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Plane C-130
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Phone Icon(360) 956-0800Email Iconinfo@fourstar.aeroMap Pin Icon7711 New Market Street SW Tumwater, WA 98501
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location7711 New Market Street SW
Tumwater, WA 98501
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Complete Accessory Solutions

Four Star Accessory Overhaul provides full-scope accessory maintenance across eight critical aircraft systems for commercial, military, and business aviation operators worldwide. As a Class I, II, and III (Unlimited) repair station, we deliver certified repair and testing across all ATA chapters, supported by in-house NDT, calibrated testing, and traceable documentation that meet FAA, CAA, and EASA standards - with Lockheed Martin authorization for advanced accessory repair.

Systems We Service

Full-Scope Accessory Maintenance

Four Star delivers aircraft accessory maintenance that keeps your operation running. You get inspection, assembly, and test cell validation in one facility. This setup gives you clear accountability and steady quality. You reduce vendors. You speed up repair cycles. You gain a reliable MRO partner for your accessory needs.

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Need Technical Support for your aircraft?

Our team is ready to help you with your aircraft accessory repair and refurbishment needs. Get in touch with us today to get a quote.

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Technical Capabilities

Our Tumwater, Washington facility houses the specialized equipment and controlled environments needed for reliable accessory repair across hydraulic, pneumatic, electrical, and fuel systems.

Testing and Calibration

Four Star provides advanced testing and calibration services built for aircraft accessories. Our test cells mirror real operating conditions for pressure, flow, temperature and electrical load. We verify that each component performs as required. Our calibration process follows reference standards tied to national labs. Every instrument meets the specifications you need for safe and consistent operation.

Inspection Services

Four Star deploys non-destructive testing (NDT) techniques including magnetic particle, fluorescent penetrant, and visual inspection techniques to detect subsurface defects before they cause in-service failures.

Platform Support

All services are performed under FAA and EASA certifications, ensuring consistent processes and full traceability. We support platforms across Boeing, Airbus, Lockheed Martin, and Bombardier. From modern fleets to legacy aircraft, delivering the technical depth and flexibility operators depend on worldwide.

Common Questions

Repair And Refurbishment

Services We Offer

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© 2026 Four Star, All rights reserved.
UK CIVIL AVIATION AUTHORITY – PART-145 APPROVAL
FAA REPAIR STATION CERTIFICATE
EASA PART-145 APPROVAL EASA.145.4452
LOCKHEED MARTIN APPROVED REPAIR CENTER
SAG Logo© 2026 Four Star,
All rights reserved.
SAG Logo© 2026 Four Star,
All rights reserved.

Hydraulic Systems image
Hydraulic Systems
Pneumatic Systems image
Pneumatic Systems
Fuel Accessories image
Fuel Accessories
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Beacons
Nondestructive Testing image
Nondestructive Testing
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Power Generation
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Electromechanical Systems
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Cargo Accessories

Connect With Us For Certified 

Fleet Accessory Overhaul

Ensure availability with certified overhauls performed on calibrated stands and documented to specification. Share your part numbers and aircraft types, and our team will follow up within 24 hours.
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