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Having owned a MTO Sport Gyrocopter for two and a half years which was bought from Autogyro in Germany.
It was a 2011 Gyro but only bought two and a half years ago with only the test hours,3 hours on the machine,the machine was secondhand in that it was ordered from the factory by the previous owner who never took delivery as the country he was from you had to assemble 51% of the gyro so he then asked Autogyro to send him a kitset and sell his previously ordered gyro.
Recently I took my Gyro for a service and 100 hour check [the total engine hours from new is 120 hours]and they discovered that it has a cracked camshaft,when they pulled the gearbox off for further inspection the crankshaft had completely snapped off!
On further investigation I read that Rotax had in fact issued a bulletin alert saying that there was a batch of defective camshafts ,apparently 200 worldwide.
Just wondering if anyone else was affected by this and what the outcome was as it is out of warranty but clearly a manufacturing fault with the crankshaft?
Your feedback/comments would be appreciated.
Kind regards
Richard Wagner
  • Re: Broken crankshaft

    by » 7 years ago


    There were service bulletins issued on that topic in 2012 and again in 2013.
    Does the engine logbook indicate that the bulletins were checked and complied with?

    see list below...

    SB-912-059 Checking of the crankshaft journal for Rotax engine type 912 and 914
    2012-01-01
    Due to a deviation in the manufacturing process, some crankshafts may have a crack formation occur on the power take off side. These cracks can cause a breakage of the crankshaft support bearing and may lead to engine stoppage.

    SB-912-059UL Checking of the crankshaft journal for Rotax engine type 912 and 914
    2012-01-01
    Due to a deviation in the manufacturing process, some crankshafts may have a crack formation occur on the power take off side. These cracks can cause a breakage of the crankshaft support bearing and may lead to engine stoppage.

    SB-914-042 Checking of the crankshaft journal for Rotax engine type 912 and 914
    2012-01-01
    Due to a deviation in the manufacturing process, some crankshafts may have a crack formation occur on the power take off side. These cracks can cause a breakage of the crankshaft support bearing and may lead to engine stoppage.

    SB-914-042UL Checking of the crankshaft journal for Rotax engine type 912 and 914
    2012-01-01
    Due to a deviation in the manufacturing process, some crankshafts may have a crack formation occur on the power take off side. These cracks can cause a breakage of the crankshaft support bearing and may lead to engine stoppage.

    SB-914-045UL Periodic checking of the crankshaft journal for Rotax Engine Type 912 and 914 (series) 2013-10-10
    Due to a deviation in the manufacturing process some crankshafts may have a crack formation occur on the power take off side. This bulletin documents the mandatory procedure to check for this condition.

    SB-912-064 Periodic checking of the crankshaft journal for Rotax Engine Type 912 and 914 (series) 2013-11-11
    Due to a deviation in the manufacturing process some crankshafts may have a crack formation occur on the power take off side. This bulletin documents the mandatory procedure to check for this condition.

    SB-914-045 Periodic checking of the crankshaft journal for Rotax Engine Type 912 and 914 (series) R1
    2013-11-11
    Due to a deviation in the manufacturing process some crankshafts may have a crack formation occur on the power take off side. This bulletin documents the mandatory procedure to check for this condition.

    SB-912-064UL Periodic checking of the crankshaft journal for Rotax Engine Type 912 and 914 (series) 2013-11-11
    Due to a deviation in the manufacturing process some crankshafts may have a crack formation occur on the power take off side. This bulletin documents the mandatory procedure to check for this condition.

    SB-914-045UL_R1 Periodic checking of the crankshaft journal for Rotax Engine Type 912 and 914 (series) 2013-11-11
    Due to a deviation in the manufacturing process some crankshafts may have a crack formation occur on the power take off side. This revised bulletin documents the mandatory procedure to check for this condition.

    Thank you said by: Richard Wagner

  • Re: Broken crankshaft

    by » 7 years ago


    All bulletins were checked and complied with according to the service agents Solo Wings in Tauranga New Zealand.
    We are now still waiting on a response from Rotax with regards to what Rotax is going to do, as it is clearly a factory fault and an engine with very low hours.
    We certainly hope to have a positive response soon as it has now been three weeks since the issue was raised.
    Kind regards
    Richard Wagner

  • Re: Broken crankshaft

    by » 7 years ago


    ROTAX factory was closed (summer vacation!) the previous week but they have resumed operations now.
    If you still haven't received any response, send us an email with all the details and we can escalate your inquiry.

    Thank you said by: Thomas Hauklien

  • Re: Broken crankshaft

    by » 7 years ago


    Rotax have lived up to their reputation and have come to the party replacing the crankshaft and labour to rectify the issue.Well done Rotax!!

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