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inner middle outer marker & Single CH

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    inner middle outer marker & Single CH

    Hello everyone,
    I own MSFS PMDG 737-700 for a long time,
    but I can't figure out some questions.

    I was flying with PMDG from FSX until now MSFS.
    but I don't know why now I do ILS landing on ANY airport in Asia with ILS,
    PFD won't have M marker (blue ,orange, white) also no sounds(even I turn on the sound maker.)


    it's MSFS took away the "inner middle outer marker" function out or is something going wrong?

    and one more question is,
    I realized druing ILS landing , I don't know why the PFD show "single CH", and I didn't enable failed function in 737.
    as I remember when I flew with FSX, there should be all "LAND 3", how can I fix this problem?

    Thanks all of you.

    ==

    RenBin Wong

    #2
    Check the approach charts. Many of these beacons have been decommissioned. If they are not on the current chart then they don't exist.

    Single CH means what it says, you only have one autopilot active. You need to have both A & B for the approach and both NAVs setup on the correct course and frequency to enable autoland. You will normally see CMD for fail passive but if you select the fail operational option then you see LAND 3.
    Dan Downs KCRP
    i7-10700K 32GB 3600MHz 3080Ti

    Comment


    • foiegras2008
      foiegras2008 commented
      Editing a comment
      I'll try next time , thank you

    • HaMa
      HaMa commented
      Editing a comment
      And it takes a while till CMD shows up. I turn on AP B when on GS, but then Single Ch is shown for a while. I do not know when CMD activates, if it depends on AGL or distance to threshold, but it appears quite late.
      And sometimes CMD even does not activate, cause some airports/runways are not allowed for autoland.

    • DDowns
      DDowns commented
      Editing a comment
      HaMa the CMD appears when the AFDS performs a self-test, noted by a blinking PFD display, at or about 1700 AAL. The airport/runway status regarding an autoland has nothing to do with how the aircraft operates. The autoland capability is always there for an ILS, it's up to the pilot to observe the minimums for the approach being flown.

    #3
    For LAND 3 you also need to set the options to Fail OPS, you have Fail passive selected which has lower landing capability and therefore hight decision altitudes.
    René Moelaert EHLE

    Comment


    • foiegras2008
      foiegras2008 commented
      Editing a comment
      Hi , May I ask what is "Fail passive", thanks

    • Fleng200
      Fleng200 commented
      Editing a comment
      In Fail Passive, there are less autopilot channels (only 2) available to check each other. If there is a difference between the 2, you do not know which one is faulty. Fail Passive has 3 channels, a different one is recognizable.
      It is a paid option, and you only need it if you land in bad weather, an thus low decision heights. That is an economic choice, if you don’t have much bad weather landings, it might be too expensive. A single divertion will be cheaper.

    #4
    I'll have to double check OM, but I definitely got IM and MM (and audio) during an approach this evening.
    William Duncanson

    Comment


      #5
      Originally posted by Caesar View Post
      I'll have to double check OM, but I definitely got IM and MM (and audio) during an approach this evening.
      You missed the point being that not all ILS are the same, you have to check the chart to see what equipment is available.
      Dan Downs KCRP
      i7-10700K 32GB 3600MHz 3080Ti

      Comment


        #6
        "the CMD appears when the AFDS performs a self-test, noted by a blinking PFD display, at or about 1700 AAL. The airport/runway status regarding an autoland has nothing to do with how the aircraft operates. The autoland capability is always there for an ILS, it's up to the pilot to observe the minimums for the approach being flown"
        Thank you for this DDowns
        Regards from EDKF,
        Markus Hardt

        Comment


          #7
          Originally posted by DDowns View Post

          You missed the point being that not all ILS are the same, you have to check the chart to see what equipment is available.
          No, I was pointing out that, when present, the markers are annunciated both visually and aurally.
          William Duncanson

          Comment

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