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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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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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Gulfstream Water Line Ribbon Heater Upgrade

GIV operators must complete CB194A or ASC 469 Water Line Ribbon Heater Upgrade by September 4, 2011. Schedules are expected to tighten. The best course of action is to schedule as soon as possible.

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Hartzell Propeller AD94-17-13

Hartzell propeller AD94-17-13 and SB165E are very confusing, and you need to read both in their entirety to understand their full meaning.

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