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.
December 31, 2009, is the deadline to comply with AD 2006-04-12. Although General Electric is working diligently trying to contact operators with information on completing this AD prior to the deadline, they estimate there will be about 20 aircraft that will not be in compliance.
The P&W Service Bulletin 30382 introduces a seal between the turbine exhaust case and the turbine exhaust mixer assembly to keep hot exhaust gases from sensitive areas.
Carrying the RVSM manual on board is only a regulatory requirement when the Operations Specifications, Letter Of Authorization or the FAA-approved RVSM maintenance manual states that you must have it on board. Having the RVSM manual on board, however, can be quite valuable in certain situations and is always a good idea.
Dave Schiver, Duncan Aviation Learjet Tech Rep, answers your questions in regards to RVSM pitot probe alignment inspections on aircraft that have the Bombardier STC solutions installed.
Pratt & Whitney recently released SB30393, recommending that the Electronic Engine Control (EEC) support brackets be replaced within 300 hours to help eliminate problems due to vibratory stresses.
There have been some questions raised lately about the flap tracks on the Lear 40 series aircraft, particularly regarding the Perma Silk G coating.
If you operate a Hawker 750, 800XP, 850XP or 900XP, please take note. Hawker Beechcraft Corporation recently released Mandatory Service Bulletin (MSB) 24-3968 titled Electrical Power-Introduction of In-Line Fuses...
If your autopilot is not performing as well as it once was, there are a few quick items you can easily check...
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