Flaps keep lowering to full down unprompted

[dennisflyz]

Flaps on the challenger 650 keep lowering to full down unprompted throughout the flight at irregular intervals. I unbinded all flap controls from peripherals, and this issue persists. In cruise this is causing obvious issues, as the speed bug gets lower to VFE, and aircraft pitches up to regulate speed. Any suggestions are welcome.

[Pils]

  On 12/11/2024 at 12:27 AM, dennisflyz said:

I unbinded all flap controls from peripherals

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Might want to triple check that, also check keyboard bindings? Because not heard of this before otherwise.

Also, please upload Log.txt from X-Plane, thanks.

[Pils]

  On 12/11/2024 at 12:27 AM, dennisflyz said:

Flaps on the challenger 650 keep lowering to full down unprompted throughout the flight at irregular intervals.

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Is the flap lever moving, or just the flaps?

[AggieRotorhead]

I have had slightly different variation where my flaps retract on final after I have fully extended them and verified set.  I find out when I get the callout "flaps".  It's happened on my last 3 approaches.  I'll look next time to see if the lever moved or just the flaps.

[Pils]

  On 1/31/2025 at 9:56 PM, AggieRotorhead said:

I have had slightly different variation where my flaps retract on final after I have fully extended them and verified set.  I find out when I get the callout "flaps".  It's happened on my last 3 approaches.  I'll look next time to see if the lever moved or just the flaps.

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Are you referring to the Before Landing "Flaps ... Set" call out? Any other call outs?

[AggieRotorhead]

The landing checklist is complete.  It is a CAS system callout "Flaps" and doesn't sound like the FO.

[Pils]

  On 2/6/2025 at 6:43 PM, AggieRotorhead said:

The landing checklist is complete.  It is a CAS system callout "Flaps" and doesn't sound like the FO.

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I think I'm going to need to see a video of an approach to fully understand.