On a recent test flight with a rotax 915 aircraft, the lane B light came on as we were coming in on approach. The engine was at 3700 rpm. We attempted to switch the lane B off and then back on, but the warning light did not go off. Instead, shortly after, the lane A light came on. At this point both lane lights were solid. We purposely picked up a little more altitude in case the engine quit, so we could make the runway just in case. Luckily it did not, and about 10 seconds later both lane lights went off. Landing was uneventful. The question for those who have flown or serviced the 915, has this happened to any of you, or have you heard it happening? It seems very similar to the lane light problems in the 912is, so that’s what we found discouraging. Thoughts?
  • Re: Lane lights on in flight

    by » 7 months ago


    You will need to connect a Buds Dongle to the ECU to find out what the fault was. Without this data anyone would simply be guessing at the cause.

  • Re: Lane lights on in flight

    by » 7 months ago


    Where can you purchase a level 2 BUDS dongle?

  • Re: Lane lights on in flight

    by » 7 months ago


    California power systems has the Dongle in stock
    www.cps-parts.com

  • Re: Lane lights on in flight

    by » 7 months ago


    Check with your regional service center. If they don't have one then call another service center.

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-574-1080 Home (TRY HOME FIRST)
    520-349-7056 Cell

  • Re: Lane lights on in flight

    by » 7 months ago


    You should look at the similar problems I have been dealing with the 912iS. In summary, you may be able to purchase the $1000 dongle, like I did, but the results are nearly impossible to understand and trouble shoot unless you get the software that will explain and help you understand the error messages. This has been a big problem that rotax needs to fix but has failed to support the pilots and rotax mechanics in the field.

    If you want the full story see the 912iS post "BUDS dongle ECU download error code messages reference" to see what WE ARE ALL facing as owners/operators/mechanics with the 912iS and NOW with the 915. Welcome to the club.

    Simple fix but rotax refuses to fix it/help us.

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