Why the Dukane TS500 Is 2025’s Go-To ULB Test Set for Aviation Maintenance
Aviation safety has always hinged on precision, reliability, and compliance with rigorous standards. Among the countless systems that keep aircraft safe, one often overlooked yet mission-critical device is the Underwater Locator Beacon (ULB). Installed on flight data recorders (FDRs) and cockpit voice recorders (CVRs), ULBs are essential in search-and-recovery efforts when accidents occur. To ensure they operate as expected, aviation maintenance professionals require test equipment that is accurate, durable, and versatile.
In 2025, one device has emerged as the gold standard for ULB testing: the Dukane TS500 ULB Ultrasonic Test Set. Whether in a hangar, on the flight line, or at a maintenance repair and overhaul (MRO) facility, the TS500 is trusted worldwide for its ability to validate ULB performance quickly and reliably.
In this article, we’ll explore why the Dukane TS500 is the aviation industry’s preferred choice in 2025, highlight its features and benefits500, discuss real-world applications, and introduce AvionTEq as the trusted supplier and service partner for this indispensable tool.
The Rising Importance of ULB Testing in 2025
ULBs are required by aviation regulators worldwide like FAA & EASA, and in recent years, compliance standards have only become more stringent. Airlines, MROs, and defense operators must demonstrate that their ULBs are operational and compliant with international and local mandates.
By 2025, the expectation isn’t just testing every 24 months as mandated; operators are increasingly adopting proactive testing strategies to reduce risk and ensure fleet readiness. This has led to higher demand for portable, rugged, and precise test equipment—qualities the Dukane TS500 embodies.
What Sets the Dukane TS500 Apart?
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Dual-Frequency Flexibility
The TS500 is capable of testing both 37.5 kHz and 8.8 kHz beacons, covering virtually every model of ULB used in commercial, military, and general aviation. This dual-frequency feature ensures compatibility with current fleets and legacy equipment, minimizing the need for multiple testers.
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Compact and Lightweight Design
Weighing just over one pound and measuring approximately 6.5 × 3.25 × 1.3 inches, the TS500 is portable enough to be carried anywhere—perfect for on-site inspections, line maintenance, and fieldwork.
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Rugged and Reliable
Encased in a durable housing and supplied with a protective case, the TS500 is built for challenging environments. Its design reflects the realities of aviation maintenance, where equipment must withstand frequent handling, travel, and varying conditions.
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Battery-Powered Convenience
The unit operates on a standard 9V battery, eliminating the need for external power sources and making it truly field-ready. This ensures uninterrupted performance, even in remote locations.
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Clear, User-Friendly Display
The built-in LCD screen provides precise, easy-to-read results. This simplicity reduces training time and allows technicians to focus on their task—ensuring that ULBs are functioning as required.
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On-Mount Testing Capability
One of the TS500’s greatest time-saving features is the ability to test beacons without removing them from their mounting location. This significantly reduces maintenance downtime and simplifies compliance testing.
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Battery Voltage Measurement
In addition to acoustic verification, the TS500 measures the beacon’s battery voltage, giving technicians a complete picture of the ULB’s health and expected lifespan.
Benefits of the TS500 for Aviation Maintenance
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Compliance Made Easy
With regulatory oversight increasing globally, the TS500 makes it straightforward to perform operational tests that meet ICAO and FAA standards.
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Efficiency in Operations
By allowing on-mount testing and dual-frequency checks, the TS500 reduces inspection times and eliminates unnecessary component removal—saving both labor hours and costs.
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Trusted by Industry Professionals
Feedback from technicians in 2024 and 2025 consistently praises the TS500’s ease of use, reliability, and accuracy. Aviation maintenance teams worldwide recognize it as a dependable tool they can trust in critical inspections.
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Versatility Across Fleets
From legacy aircraft still in service to the latest commercial airliners, the TS500 can handle virtually every ULB in the market. This versatility is invaluable for MROs and airlines with diverse fleets.
Real-World Applications
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Airline and MRO Maintenance
Airlines and MROs use the TS500 to ensure all recorders are compliant before aircraft return to service. Its portability makes it ideal for line maintenance operations as well as in hangar-based inspections.
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Defense Aviation
Military aviation units value the TS500 for its rugged design and reliability in diverse environments. Whether on a naval deck or in a desert base, the TS500 proves dependable.
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General Aviation
Private aircraft operators and charter services also benefit from the TS500’s compact form and user-friendly operation, ensuring their ULBs remain operational and compliant.
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Training Facilities
Aviation training centers rely on the TS500 to familiarize maintenance engineers with industry-standard tools, preparing them for careers in airlines and MRO organizations.
Why the TS500 Is Still the Go-To in 2025
While some newer test systems have been introduced, the TS500 continues to dominate the market because of its balance of simplicity, precision, and cost-effectiveness. Its proven track record and global adoption make it the trusted choice for aviation organizations seeking reliability without unnecessary complexity.
In 2025, airlines and MROs increasingly prioritize tools that minimize downtime, reduce costs, and ensure compliance. The Dukane TS500 checks all those boxes—cementing its position as the go-to ULB test set in aviation maintenance.
When sourcing the Dukane TS500, it’s important to work with a supplier that understands the critical nature of aviation test equipment. This is where AvionTEq stands out.
Why Choose AvionTEq?
- Authorized Supplier: Access new and refurbished TS500 units, all calibrated and certified
- Flexible Options: Buy, rent, or lease the TS500 depending on your operational requirements.
- Calibration & Repairs: AvionTEq offers expert calibration and repair services to ensure your tester stays reliable and compliant.
- Trade-In Program: Upgrade from older, obsolete models such as the TS200 and receive trade-in credits.
- Expert Support: AvionTEq’s knowledgeable team provides pre- and post-sales guidance to help you integrate the TS500 seamlessly into your maintenance processes.
With a proven reputation in the aviation industry and recognition as a trusted distributor of avionics test equipment, AvionTEq provides not only the TS500 but also the support and services that keep your operations running smoothly.
Take your aviation maintenance operations to the next level with the Dukane TS500
AvionTEq offers the TS500 through flexible purchase, rental and trade-in programs, along with calibration and repair services designed to keep your equipment performing at its best.
With AvionTEq, you don’t just get equipment—you gain a trusted partner dedicated to keeping your operations safe, compliant, and efficient.