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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Customers often assume failures can’t happen when they aren’t flying but talk to any of Duncan Aviation’s Satellite Shops, and we’ll confirm it’s a very common occurrence.
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.
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.
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.
Is your aircraft compliant? Missing small inspections tied to STCs or life-limited parts can lead to costly downtime and mandatory replacements. Learn why detailed records research is essential.
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.
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.
To continue conducting business, operators need to stay connected to their contacts on the ground while at any altitude, anywhere in the world. Here is a low-cost alternative.
We urge a thorough inspection of this specific area during all future maintenance, especially as part of a pre-purchase evaluation, to detect and address cracks early.
Not sure why the engine computer light begins to flash after several flights and the only fault you can see is fault code 237, ECTM Buffer Filled? Keep reading to learn more.
Many factors will cause a low or high oil pressure indication on TFE731 engines. One of the more common causes is a faulty Breather Pressurizing Valve (BPV).
The unit requires to be function tested every 1200 hours or 36 Months, whichever occurs first. However, we have often witnessed that these actuators do not make it between function tests.
With so many makes and models available, finding the best fit for your needs can be challenging.
Safety Management Systems: why they are essential, and how they are not all the same.
The main system components of the factory-installed FDR covered by STC10001SC-D are obsolete. They are no longer available for purchase or repair, and there is no longer a method of support for any of these critical FDR components.