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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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August 2025 Edition

Honeywell AS907 (HTF7000) Engine Inspection Intervals

Most inspection tasks on the Honeywell AS907 (HTF7000) are straightforward, offering consistent turntimes and cost expectations. However, it's important to note that the Borescope inspections of turbine and compressor components can reveal issues that may extend downtime and increase costs

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August 2025 Edition

Learjet Gust Locks Prevent Unnecessary Surface Damage

Gust locks lock the control column in place, preventing random movement and possible damage of the surface from wind while an aircraft is parked. It only takes a small investment to prevent damage that could cost tens of thousands of dollars and hours to repair.

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Esterline CMC Electronics CMA-6800 Display

This STC is an AML that includes Hawker 800/XP/1000, Bombardier’s Challenger CL-601/601-3A/3R, Dash 8–100/200/300 and its 415 Superscooper, Cessna Citation 650, Dassault Falcon 900, Fokker 50, and the Gulfstream III, with additional models to follow.

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Five Reasons to Upgrade to the DL-950

If you still use floppy disks to update your navigation databases and have a Honeywell DL-900 data loader, there are five very good reasons to look at upgrading to the DL-950 or DL-1000.

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APU Control System: Which Box Do I Send in for Repair?

The Duncan Aviation /Garrett APU system interfaces with the aircraft’s electrical system and includes controls for operating, monitoring, and regulating the APU. As seldom as these systems fail, when they do, it can be confusing to determine which box is causing the problem.

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