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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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.
Pratt & Whitney has recently notified Falcon 2000EX operators of ESP of a new service enhancement for their engines. This upgrade will allow operators who currently or wish to fly “on condition”...
If your autopilot is not performing as well as it once was, there are a few quick items you can easily check...
Pratt & Whitney recently released Commercial Support Program Notification (CSPN) 1004357, offering parts and labor support for complying with SB30381
To avoid significant delays during 120-month (CL600/601) or 96-month (CL604) landing gear restorations, we highly recommend that you serialize landing gear parts and establish records for each before your landing gear restoration comes due
Calibrating Gulton / Ametek (formerly Conrac) Stall Computers just got more confusing with two major changes to the Maintenance Manuals. Avoid frustration with these tips
For all aircraft that have an air cycle machine, leaks, cooling turbine, intercoolers, regulators and air supply sources are more prone to show their deficiencies when cooling air if they are not up to specification
If the ADF quits pointing on your King Air, be sure to check the AC Fuse in the nose’s right-hand J-box
AD 2004-07-21addresses issues with the Astra starter generator firewall cable support and the cables themselves. If you have not had the cable support replaced, you are not in compliance with this AD
Service Bulletin SB25353 allows the remaining PW306C operators to have the new carbon face seal put in their engines. Before installing the carbon face seal at the gear shaft location, the gear shaft must be replaced or modified by removing it from the gearbox
When removing the over-the-wing anti-ice lines during the Falcon C inspection, watch for corrosion on the clamps and tubing holding the left-hand and right-hand peri-seal heat shields in place