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Duncan Intelligence Newsletter

The Duncan Intelligence is a free, technical newsletter for business aircraft owners and operators. Written in-house by Duncan Aviation's technical representatives, each edition includes technical tips and advice on topics and trends in business aviation. It is a free, monthly e-mail subscription for aviation enthusiasts around the world.

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April 2026 Edition

The Current Aftermarket For The Bombardier Global Express XRS Business Jet

As the pre-owned aircraft market stabilizes, the Bombardier Global Express XRS has solidified its status as the top-tier value choice for ultra-long-range travel. Offering intercontinental reach and a proven platform at a significant discount compared to newer models, the XRS represents a strategic entry point for value-conscious operators. The following analysis breaks down the current pricing trends, critical value drivers, and the competitive landscape for this enduring market leader.

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April 2026 Edition

Optimizing Falcon Jet Cabin Comfort: The Critical Role Of Temperature Sensor Maintenance

The precision of an aircraft’s Environmental Control System depends on small, often-overlooked temperature sensors. These units act as miniature vacuums, drawing in cabin air, along with dust and debris, to provide the real-time data necessary for passenger comfort. This article explores why regular cleaning and maintenance of these sensors is critical to ensuring the ECS delivers the precise climate control it was engineered to provide.

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April 2026 Edition

Is It Possible To Wash My Jet's Engine Too Much?

It’s a common question that many operators hesitate to ask, but the answer is a definitive no. In reality, regular gas-path cleaning is a vital pillar of preventive maintenance, especially for aircraft operating in salt air or polluted environments. A strategic wash schedule is your best defense against performance loss and the high cost of corrosion.

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April 2026 Edition

Comply Proactively With SB 45-27-54: Learjet Aileron

Affecting 600+ aircraft, these Learjet aileron Service Bulletins require specialized NDT inspections and structural modifications. Duncan Aviation’s experts break down the requirements, downtime expectations, and why choosing the right facility is vital.

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January 2026 Edition
Navigating The Regulatory Skies: How Aircraft Paint Approvals Vary By Country

A fresh coat of paint is more than just a cosmetic upgrade—it’s a regulatory event that varies significantly by jurisdiction. While the FAA views painting as routine maintenance, authorities like EASA classify it as a design change requiring formal approval. Learn how understanding these regional nuances can help you avoid costly administrative delays and keep your aircraft compliant across international borders.

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Removing Obsolete Systems and Antennas on Business Jets

As business aviation fleets modernize, many aircraft are still carrying the literal weight of the past. Removing obsolete avionics and legacy antennas can reduce maintenance burdens, improve performance, and boost resale value. This article explores why streamlining your aircraft’s configuration is a strategic investment in long-term operational efficiency.

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January 2026 Edition
Safety & Compliance: Why Detailed Aircraft Logbook Entries Matter

What can ground an aircraft faster than a failed component? Documentation. When you think about what keeps your aircraft airworthy, you usually think of tangible systems such as engines, avionics, landing gear, and flight controls. Rarely does paperwork top the list. It should.

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December 2025 Edition
Aircraft Sales & Acquisitions: 2025 Year-End Trends, Market Behavior, and What Buyers Should Expect

As 2025 comes to an end, ACS Rep Rene Cardona reflects on what shaped this year’s preowned business jet market. The fourth quarter is always busy, but this year brought a unique level of intensity, driven by economic uncertainty early on and a surge of confident buyers later. Here’s his perspective on what we experienced in 2025—and what to expect as we head into 2026.

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December 2025 Edition
Nose Landing Gear: Shimmy Vs. Out-Of-Balance Wheel

Don't get grounded by confusing nose wheel vibrations! A true nose gear shimmy—that rapid, side-to-side oscillation—is a serious issue often linked to play in the torque links, requiring immediate mechanical attention. In contrast, a simple vertical shudder felt during taxi or initial climb is often just an easily corrected wheel imbalance. This quick guide details the key differences and the essential steps to accurately troubleshoot the condition, starting with a simple inspection of the nose gear scissors.

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December 2025 Edition
Optimizing Aircraft Battery Performance: The Impact Of Temperature On Storage

Don't Let Your Spare Aircraft Batteries Go Flat! Keeping a stock of essential aircraft batteries is crucial for operational readiness, but did you know that improper storage can drastically cut their lifespan and capacity? While temperature affects performance in the air, the storage environment is key to minimizing self-discharge and maintenance needs. Discover how optimizing storage temperature—from the effects of higher heat to the benefits of cold storage—can save you money, extend battery life, and ensure your spares are ready to deliver maximum performance when you need them most.

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December 2025 Edition
TFE731: New Oil Tank Instruction Plate Reminder

Honeywell has issued two Category II Reliability Service Bulletins, TFE731-79-3070 R1 and TFE731-79-5120, for the installation of new instruction plate decals on oil tanks to help prevent oil over-servicing.

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