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IRS/POS SHIFT issue

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    IRS/POS SHIFT issue

    Dear Concerned;

    We made a normal IRS alignment of yesterday flight, maybe we catched something, we cant understand, when crusing PF & PNF Nav Disp. Shows an unreliable POS SHIFTS, you may see the differences of Displays(Especially HDG BUGs and TRK pos) , after that we were unable to perform an RNP/ANP data via Magenta Track, so we flew as a conventional flight(until arrival for our DEST) via NDB and VORS with HSI ADF via Jeppesen Hardcopy Maps on our hands , normally we could copy&put the FMC-L(<279'/0.0NM) onto the FMC-R(333'/0.0NM>) informations(but this function is not working) on the CPT CDU(POS SHIFT PAGE) then the ND data could be shows correct and reliable may be:S , otherwise but if the error persists, one of the ND pages CPT or F/O panels seem to be incorrect as a wrong TRK Path and by the way When we set the PLN mode on EFIS , Shifting informations(POS SHIFT PAGE) ''some datas''values are not seems on the ND(POS mode) , and finally please check the ''FD'' of First officer via 3rd) screenshot; there was not a Lateral Track Magenta, there was only VNAV command on the same flight, these are not a normal circumstances..

    Finally We made a Safe Landing but this issues were the first experience and was interesting for me

    Screenshots

    1st) https://ibb.co/7JcvTZn

    2nd) https://ibb.co/7kTT3TZ

    3rd) https://ibb.co/G2wTmN1

    Best Regards
    Erkal SANLI
    Last edited by Erkas; 02May2020, 00:42.
    Erkal SANLI - LTFJ

    #2
    Could you tell me exactly which indications are incorrect in the screenshots 1 and 2?
    You have an ANP of 0.05 that should be perfectly fine for flying and RNAV approach?

    Your conventional backup on the ND seems to match the FMC position as well (did you try POS mode?) and your position offset is zero.
    Greetings,
    Emanuel Hagen

    Comment


      #3
      Dear Emanuel Hi,

      But what I meant was the difference between the navigation displays of both side and differences between FMC-L(<279'/0.0NM) and FMC-R(333'/0.0NM>)

      and which indicators should I trust here, which ones are correct? and (did you try POS mode?) = Yes I Did.


      Best Regards
      Erkal SANLI
      Erkal SANLI - LTFJ

      Comment


        #4
        Ah, now I see what you mean. Interesting one indeed. One has wind, the other doesn't. While there is indeed a heading difference in the FMC positions there is none in the actual position deviation (0,0NM).
        Are you using the NGXu in P3Dv5 maybe? Keep in mind it's not officially compatible yet and reasons like the above might well the be cause for it.
        Greetings,
        Emanuel Hagen

        Comment


          #5
          No I am 4.5 user Thanks for reply.
          Erkal SANLI - LTFJ

          Comment


            #6
            That really leaves me without an idea what may be wrong here. Probably something between the NGXu's integration into the sim and the sim itself.
            I suggest to open a support ticket directly at the PMDG website so that you can talk directly to them. I'm sure they'll have an idea and be able to solve this.
            Greetings,
            Emanuel Hagen

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