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Stab trim issue during autoland

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    Stab trim issue during autoland

    Hey everybody,

    during ILS autoland (APP mode, both CMDs active, LOC and G/S captured, Land3 active, fully configured for landing with flaps 30) I constantly notice extreme nose-up stab trimming up to the point where “stab out of trim” light warming light turns on.Then A/P disengages.I encounter this problem independent of fuel and payload settings. Anybody else experiencing the same problem.Any solution to this issue.

    Marcus-André Deutsch
    Last edited by Marcus-Andre Deutsch; 01Sep2022, 06:50.

    #2
    Please sign your posts with your full name , yes I know you've used it as a user name but you still need to sign each post. Use a signature on your profile page to do this. Its a mandatory requirement you agreed to do, when you registered for this forum.
    OK smack on the wrist delivered.............

    In the past this sort of behaviour has been known to be caused by having some Assistance Options in MSFS turned on. They must all be set to off. Crash and damage disabled and all piloting set to HARD. Flight model must be set to Modern, not Legacy. Go check those first, then report back.
    Eddie Zetlein, Surrey.

    Comment


      #3
      While checking the Assistance Options is always a good thing, this particular issue was found to be caused by a corrupt MSFS cloud save affecting the weight characteristics of the aircraft (it thinking it was heavier than it really was), thus causing the pitch angle and trim issues.

      Use the forum search function and you’ll find a giant thread about this issue. You can also search for clearing your MSFS cloud save to get a description of how to fix the problem.

      Comment


        #4
        Originally posted by Marcus-Andre Deutsch View Post
        Hey everybody,

        during ILS autoland (...)
        Go to
        Community/pmdg-aircraft-738 or 736/737/Documentation
        open file named PMDG_737_MSFS_Introduction.pdf
        page 26 and 27


        Originally posted by Max Rate View Post
        (...) You can also search for clearing your MSFS cloud save to get a description of how to fix the problem.
        https://forums.flightsimulator.com/t...-for-me/470438

        Also important https://forums.flightsimulator.com/t/ctd-when-connected-to-internet-delete-cloud-data-this-fixed-it-for-me/470438/7?u=tenpatrol
        Last edited by TENPATROL; 01Sep2022, 16:06.
        Krzysztof O

        Comment


          #5
          Originally posted by Marcus-Andre Deutsch View Post
          Hey everybody,

          during ILS autoland (APP mode, both CMDs active, LOC and G/S captured, Land3 active, fully configured for landing with flaps 30) I constantly notice extreme nose-up stab trimming up to the point where “stab out of trim” light warming light turns on.Then A/P disengages.I encounter this problem independent of fuel and payload settings. Anybody else experiencing the same problem.Any solution to this issue.

          Marcus-André Deutsch
          Just a side note, unrelated to your problem, that Flap40 is normally required for Autoland.
          Dan Downs KCRP
          i7-10700K 32GB 3600MHz 3080Ti

          Comment


          • MeatServo
            MeatServo commented
            Editing a comment
            Not required but recommended in poor visibility to see over the nose. She'll do an autoland flaps 30 just fine.
            Last edited by MeatServo; 01Sep2022, 17:19.

          #6
          Originally posted by Marcus-Andre Deutsch View Post
          Hey everybody,

          during ILS autoland (APP mode, both CMDs active, LOC and G/S captured, Land3 active, fully configured for landing with flaps 30) I constantly notice extreme nose-up stab trimming up to the point where “stab out of trim” light warming light turns on.Then A/P disengages.I encounter this problem independent of fuel and payload settings. Anybody else experiencing the same problem.Any solution to this issue.

          Marcus-André Deutsch
          I had this issue and the only thing that fixed it was to reset my Microsoft online MSFS profile.
          Nothing else fixed it. Keep in mind it erases everything in your settings, logbooks, etc. But it fixes the issue.

          Teo
          Teofilo Homsany

          Comment


            #7
            Issue solved:

            I found the fix for the problem.It is the same fix for a problem that occurred during final approach with the Fenix A320 (uncontrollable stall).The flap axis 0-100% (control settings under secondary control surfaces) assignment has to be deleted!Nothing more,nothing less.Deleting the MSFS cloud profile will basically have the same effect because it erases all assignments within control settings.Thanks for your inputs!Happy landings!

            Marcus-André Deutsch

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