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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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July 2025 Edition

Video: Radar Stabilization Function Failure

A little understanding on how radar stabilization works can help both the flight crew determine erroneous return information, and assist the maintenance technicians tasked with troubleshooting the system.

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Radar Operation Tips

The Honeywell ART 2000 and ART 2100 are high-performance modern radar that is proven reliable. But even simple things like getting in a hurry when shutting down the system can have a huge negative impact on operation over time.

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Make Records & Research a part of your Maintenance Event

Within the last three years, I've reviewed several aircraft maintenance records for various aircraft and noted missing entries regarding non-OEM-related equipment. It’s not the major maintenance and inspections that are missing from the logbooks, but rather the small unknown inspections and ongoing required programs that remain outstanding.

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Learjet 35/ 55: Amp Split

The generator control panel controls the voltage for generators that charge batteries, start motors and control the ground power unit. When working properly, these generators share the electrical load.

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Hawker: Technical Manual Deviation Approval

Some Hawker and Beechcraft operators may not be aware there is a wealth of information in the Technical Publications area on the Beechcraft website regarding changes not yet been incorporated into the affected manuals.

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Pratt & Whitney Service Bulletin Update

For the Pratt & Whitney 500 engine models, there are a number of Service Bulletins that have become hot items. These can be accomplished at access for cause but they will be addressed at either a Hot Section Inspection or overhaul, whichever occurs first.

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