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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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Read the Latest Articles

June 2025 Edition

Gulfstream 550 Intermittent Fuel Quantity

Duncan Aviation airframe technicians recently addressed recurring intermittent fuel quantity issues in two Gulfstream 550 aircraft. Continue reading to learn about their troubleshooting steps and the results they achieved.

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June 2025 Edition

Aviation Clean Air Ionization System For Odor- & Pathogen-Free Flying

One of the most annoying things that detracts from the comfort and convenience of flying is a lingering, unpleasant odor. For the last several years, Duncan Aviation has been installing the air-cleaning ionization system from ACA, and our clients have been pleasantly surprised by how clean and fresh the system keeps the air in the cabin during all phases of flight.

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Environmental System Squawks

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

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Navigation Unit Fails Soon After Repair

Duncan Aviation recently saw a Nav unit in our avionics shop that failed soon after being repaired by another service provider. The Duncan Aviation technician found some screws had been driven into a circuit board...

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New Challenger Flap System Capability

Members of Duncan Aviation's Challenger program have developed a portable flap systems test bench that provides immediate feedback with increased accuracy, and does not require a test flight for analysis

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Falcon 2000 Wing Anti-Ice Tube Corrosion

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

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PW306C Engine Alternator and Starter Seal Replacement

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

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