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After takeoff today both Lane A and Lane B showed solid red indications on my dash. Engine runing rough. Cycling the lane A and B did not reset the indicators.  Immediately returned to airport.  Any idea what is causing this?

  • Re: Lane A and B failures

    by » 2 years ago


    Time for a little trouble shooting to rule some things in or out and could use some more info from that flight.

    If you have a dongle / laptop computer then hook it up and see what the problem is. You can download the fault logs and data and even run the engine and see whats causing it while plugged in. 

    Did you try a another start once you landed and a mag check? How were your engine readings like fuel pressure, voltage, EGT, ect...? It may be just connections. Take a look at the ECU and its three connectors. Take each off and look at the pins and make sure they aren't burnt and make sure they are put back on tight. Don't over tighten and break them. You can apply a tad of dielectric grease. Check and inspect the engine for other loose items. 


    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell


  • Re: Lane A and B failures

    by » 2 years ago


    Thanks for your reply Roger. I did hook up a dongle and no faults or logs were shown. Also no faults revealed on my dynon HDX. Problem is in lane B and suspect a bad spark plug. Waiting for new plugs to arrive. Any other thoughts on this?


  • Re: Lane A and B failures

    by » 2 years ago


    Something is suspect here!
    If you had Lane Warning Lights, You WILL have log entries.
    If " ... NO Faults or Logs Were Shown...",  I suspect you were not actually Connected and Talking to the ECU.


    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Clicking the "Thank You" is Always Appreciated by Everyone.


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