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kenf

Autopilot randomly disengaging

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When in cruise and sometimes on approach Autopilot disengages with a message and I have to click on cmd1 to engage it again. This works but later on it happens again. This has just started recently.It happens in Vnav mode and even when this mode is turned off.I have cheched my FMC and all is the same as I have always had. I did a "repair" from add/remove but it still persists. Very frustrating as I have to keep watching!Any help would be greatly appreciated. Ken Fairbanks

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>When in cruise and sometimes on approach Autopilot disengages>with a message and I have to click on cmd1 to engage it again.>This works but later on it happens again. This has just>started recently.>It happens in Vnav mode and even when this mode is turned>off.>I have cheched my FMC and all is the same as I have always>had. I did a "repair" from add/remove but it still persists.>Very frustrating as I have to keep watching!>Any help would be greatly appreciated.> Ken FairbanksMaybe your flight stick pots has started 'spiking' and is overriding the A/P, you can turn off controls override in the PMDG options and see if that helps.Jay.

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Hi JayYou are spot-on. It was indeed the joystick.Have turned off overrides but the problem is when flying in PMDG 747-400 the joystick loses its calibration on the Y axis and I have to recalibrate. It does not do this in any other program.I am using a CH F-16 Combat Stick analog at the moment but will be getting the USB version shortly so all should be OK.Thanks for identifying the problem, it was driving me nutsRegardsKen

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