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FOUR STAR ACCESSORY OVERHAUL INC
CAA, EASA, FAA
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Supporting the aviation industry with unparalleled expertise for over 40 years, on a vast catalog of over 20,000 capabilities.
Four Star holds FAA Part 145 (EP3R483L), EASA 145.4452, and UK CAA 145.50812 certifications. We're also a Lockheed Martin approved repair center with Classes I, II, and III (Unlimited) ratings for aircraft accessory repair.
With over four decades of experience across commercial, military, and business aviation, Four Star Accessory Overhaul delivers services tailored to each sector’s unique operational needs.
Our technicians understand the distinct demands of defense fleets, commercial airlines, and executive operators - from compliance and documentation to turnaround speed and personalized support.
As a Lockheed Martin approved repair center under the Hologram Products scheme, we are authorized to service accessories on C-130 B-H series Hercules and P-3 Orion platforms, maintaining strict security and defense-level quality standards.
Our Boeing, Airbus, and Bombardier experience spans every major generation. From legacy aircraft like the 707, 747, and DC series to current models including the 737, 777, 787 Dreamliner, and Airbus A220–A380 families. We also support regional and military variants such as the CRJ-900, ATR-72, and DHC-8, along with business jets from Bombardier’s Global 7500 to the Learjet series.
This broad platform experience allows our specialists to recognize common failure modes, anticipate design nuances, and apply proven repair strategies that enhance reliability across every aircraft system.
Hydraulic Systems
Our hydraulic expertise covers flight control, landing gear, thrust reverser, engine, and brake systems. We specialize in the repair and overhaul of aircraft hydraulic pumps, valves, PCVs, PCUs, selectors, and servo actuators. Four Star delivers precise performance and reliability for every system we service.
Pneumatic Systems
Four Star Accessory Overhaul supports all bleed air and pneumatic accessories, including starters, anti-ice valves & regulators, flow control & PRVs, HPSOVs, temperature control, trim air, and outflow valves.
Fuel Accessories
We provide broad support for all aircraft fuel system accessories, from complex units like MECs, FCUs, and HMUs to pumps, servos, and valves
Beacons
We provide comprehensive repair and overhaul services for aircraft beacons and warning lights, ensuring full compliance with aviation safety and regulatory standards.
Power Generation
Our expertise encompasses constant-frequency AC systems and DC generation, including variable frequency, constant frequency, and high voltage. See us for CSD and starter/generator support.
Nondestructive Testing
Our qualified and experienced team offers the aerospace industry a comprehensive, in-house nondestructive inspection service on aircraft accessories using advanced NDI techniques
Electromechanical Systems
Our in-house capabilities extend to the testing, repair, and refurbishing of electromechanical actuators, including horizontal stabilizers, spoiler, and landing gear brake actuators.
Cargo Accessories
Our cargo accessory services support main deck, lower deck and under floor loading systems. We repair and overhaul aircraft cargo components that keep freight operations moving. This includes power drive units, pallet locks, rollers, guides, and related electromechanical assemblies. Four Star delivers reliable performance and consistency for every cargo system we service
TUMWATER, WA 98501
USA