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Hello all

The video regarding the 912iS engine redundancy was significantly interesting and I wonder If the following additional information may be shared :

  1. What was the ECU indication for each one of the wiring disconnections?
  2. What was the indication for multiple disconnections?
  3. In case of an ECU warning indication during flight, is it safe to reset the faulty lane to confirm there is a rigid malfunction?

 As has been mentioned in the video, this type of experiment should not be repeated by anyone and therefore this information can be very useful for both troubleshooting and pilot response during flight.

All the best

Ron

  • Re: ECU warnings

    by » 6 months ago


    Any chance someone to interpret this for me? Had the same error logs several times. Thanks, Dale.

    33515_2_Buds error log N912DS.pdf (You do not have access to download this file.)

  • Re: ECU warnings

    by » 6 months ago


    Ron,
    As the connections were opened, the Lane lights would flash and eventually go solid the number of faults will not effect the lights.
    Once they are ON they are ON!
    Power cycling the faulty lane Lane is a valid (and only) way to clear an intermittent fault indication.

    William,
    Before worrying about the Generator select faults, I would concentrate on the CAN Bus faults.
    Is this a new installation,?  Did it ever work correctly?
    Check the HIC connectors for integrity.
    The CAN Bus should have a 120 Ohm terminating resistor at each physical end. Two Total.
    The CAN Bus should Ohm as 60 Ohms when fully connected, or 120 Ohms if opened and measured each way.
    If the terminating resistors are Not intact, the BUS can become unstable/intermittent.


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


    Thank you said by: Ron Scheuer

  • Re: ECU warnings

    by » 3 months ago


    Hello Bill, Thank you very much for your reply. Unfortunately, I missed it when you originally posted it.

    I believe I was not clear by using the word "indications". My question was, in case of multiple failures, for instance, couple of main sensors like Manifold pressure and RPM sensors. What type of fault will the ECU generate? I assume that after downloading the BUDS files, I will identify both failures.  However, would I be able to see both of them in real time through the RS Flight system EMU?

    Thanks,

    Ron


  • Re: ECU warnings

    by » 3 months ago


    You can simulate faults on the ground by disconnecting the sensors or pulling fuses in the fuse box.
    For most sensors, the engine does NOT need to be running.
    Attach the BUDS Software
    Power up the Lanes without starting the engine and simulate away.
    For example, disconnecting an EGT probe will Indicate an "EGT #n Sensor Open" fault.
    Running the engine with an EGT Probe out of the exhaust stream will produce a different fault.
    Pulling Fuses will produce an "OPEN" fault in most cases.

    If you want to document what you find; the forum will be very appreciative.
    When you are done, "Clear All Faults" so the next time you have a Real Fault you won't have to sort it out from All the False ones.


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


    Thank you said by: Ron Scheuer

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