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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“This unit causes a constant ‘stab off’ condition and pushing the stabilization switch on and off has no effect.”
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Universal 4” & 5” FPCDUs are used widely on all make model aircraft in both commercial and business aviation. Here are the most common squawks seen by Duncan Aviation on these units.
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After ten years of servicing the Avidyne EX-500 & EX-600 Series MFDs, we have identified the three most common squawks.
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