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Thread: Red Xs asserting at ~10sec interval

  1. #1

    Red Xs asserting at ~10sec interval

    Need assistance in troubleshooting Red Xs asserting at approximately 10 second interval on magnetic heading, G-meter on the AHRS board on the EFIS board.
    The Red Xs also assert on the Attitude and Turn Coordinator when the EFIS analog display is selected.

    The Red Xs will assert in all operation conditions; on the ground with batter power with no engine running, when engine is running on the ground and in the air.
    All other display indications appear to be operating fully functional when the Red Xs appear to the specific parameter listed above. Reviewed the ADL log file and there are no indications of data lost at a 10 second interval that matches what is observed on the EFIS display.

    Let me know what other information I can gather that would assist in troubleshooting this anomaly.

    Sample ADL file attached
    DATALOG_SN71985_20230106_161631_ADL.xlsx.zip

    AF-5000 Software Version: X16.9.15-MV16 SN: 71985

  2. #2
    I assume this is in pertains to the Tehachapi build-a-plane CH750? I told one of your partners last month to check the OAT wiring. Are you aware of this prior correspondence, and can you confirm whether this has this been done?



    Jonathon Severdia
    Dec 07, 2022 ‪10:35 am‬


    It looks like your OAT has flaky wiring and is losing signal multiple times a second. We have page after page in your logs that look exactly like this:

    6875.129069] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6875.754351] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6875.944304] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6876.066682] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6876.263401] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6876.671343] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6876.760770] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6876.907687] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6876.993511] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6877.036637] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6877.084743] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6877.190992] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6877.317644] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6877.640486] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6877.736119] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6878.004158] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6878.100447] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6878.932556] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6878.973170] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6879.571545] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6879.655973] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6879.883243] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6879.967518] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6880.197600] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6880.283422] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6880.441426] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6880.509854] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6880.922887] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6880.969428] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6881.020934] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6881.150579] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6882.721693] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6882.722294] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6882.722513] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6882.722793] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6882.723490] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6882.723772] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6882.724180] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6882.724459] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6883.388643] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6883.441665] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6883.614692] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6883.652433] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6883.753670] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6883.925616] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6884.066629] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6884.237847] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6884.276206] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6884.323497] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6884.590954] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6884.953789] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6884.954243] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6885.014704] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6885.494437] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6885.533567] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6885.580796] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6885.691387] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6885.806760] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6885.892764] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6886.003760] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6886.119805] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6886.213844] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6886.261963] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6886.316473] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6886.441747] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6886.950665] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6887.079267] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6887.079672] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6887.214890] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6887.441309] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6887.580215] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6887.703353] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6887.788885] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6888.106666] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6888.156958] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6888.208093] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6888.332633] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6888.379637] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6888.792563] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6888.838214] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6888.959912] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6889.004199] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6889.156045] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6889.274179] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6889.469872] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6889.921291] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6889.964983] AF5000.AFE[2532] WARNING: SV-ADAHRS SN:9794 OAT: Offline, Adjust:0.0, Src:SV-ADAHRS-20x
    [ 6890.286173] AF5000.AFE[2532] INFO: SV-ADAHRS SN:9794 OAT: Online, Adjust:0.0, Src:SV-ADAHRS-20x



    Best guess as to how this affects the reported symptoms with your attitude display is that the ADAHRS is using so much of its bandwidth reporting the intermittent OAT sensor that, as you note, every ten seconds or so it misses getting out a report on the gyros.

    Recommend you inspect/repair/replace your OAT wiring, along the entire path if need be, but certainly I would start with the finicky microfit molex pins on the OAT plug at the ADAHRS itself.

  3. #3
    Quote Originally Posted by Jonathon View Post
    I assume this is in pertains to the Tehachapi build-a-plane CH750? I told one of your partners last month to check the OAT wiring. Are you aware of this prior correspondence, and can you confirm whether this has this been done?
    Jonathon,

    I was not aware of the previous post but will be checking with the group to determine what has been accomplished in inspecting the OAT wiring and or sensor and get back to you. Thank you for your reply.

  4. #4
    Jonathon,

    Additional information when observing the last checkout on 01/06/2023: Disconnected the OAT at the ADAHRS and still observed interval Red Xs as previously. Also notice when screen was set up with an EFIS display on the left and a MAP display on the right the left heading would display the intermittent Red Xs on the heading but the map with the heading indication would not.

  5. #5
    Well it sure was a convenient theory. On the SET --> CAL --> Advanced SV Network menu, does the firmware for the ADAHRS match the firmware for the rest of the SkyView Network devices that show up on the scan?

    Map heading will always be GPS track, not magnetic heading, and so will not be concerned with issues that you are having with the ADAHRS.

  6. #6
    Quote Originally Posted by Jonathon View Post
    Well it sure was a convenient theory. On the SET --> CAL --> Advanced SV Network menu, does the firmware for the ADAHRS match the firmware for the rest of the SkyView Network devices that show up on the scan?

    Map heading will always be GPS track, not magnetic heading, and so will not be concerned with issues that you are having with the ADAHRS.
    Jonathon, thank you. Checking the firmware as requested and will get back to you.

  7. #7
    Quote Originally Posted by AHernandez View Post
    Jonathon, thank you. Checking the firmware as requested and will get back to you.
    Jonathon,

    Below is the firmware version for the devices connected to the SkyView Network.

    Network Board Rev: 7
    Firmware Version: 3.6

    CH Product Serial Version Status
    1:AB AF-5000-SERIES 001985 16.3.A4.9069 READY
    2:AB SV-EMS-220 007694 16.3.A4.9069 READY
    3:AB SV-ADAHRS-200 009794 16.3.A4.9069 READY

    Let me know if there are any addition checks that can be done to continue troubleshooting the intermitten Red Xs.

    On another Note:
    Question: Can the aircraft be flown with the Red Xs intermittent being displayed without causing any permanent damaged to the AF-5600 system?

  8. #8
    Is your transponder cable run anywhere near the ADAHRS or ADAHRS cable? If it is try pulling the transponder circuit, see if the problem persists.

  9. #9
    Quote Originally Posted by Jonathon View Post
    Is your transponder cable run anywhere near the ADAHRS or ADAHRS cable? If it is try pulling the transponder circuit, see if the problem persists.
    Jonathon,

    I'll check if the transponder cable is near the ADAHRS or ADAHRS cable, and will pull the transponder circuit and recheck the display.

    Thank you,

    Alfonso

  10. #10
    Quote Originally Posted by AHernandez View Post
    Jonathon,

    I'll check if the transponder cable is near the ADAHRS or ADAHRS cable, and will pull the transponder circuit and recheck the display.

    Thank you,

    Alfonso
    Jonathon,

    From the team that checked on your request.

    I can

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