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912 ULS 15 Years TBO

in 912 / 914 Technical Questions 10 years ago
I understand this engine can go well beyond the 1500 / 15 year TBO that is specified by Rotax.
I have a 912 ULS 2002 with less than 200 hours on it. Will it need to be overhauled in 2017?

Regards,
Claude

  • Re: 912 ULS 15 Years TBO

    by » 10 years ago

    Hi Claude,

    Depending on who you ask this can be a debatable subject. Yes Rotax would like to see an overhaul and yes many do go well past TBO. Unless you are bound by your regulatory rules in your country then I'm a fan of going on condition. The problem can be the owner themselves. What I mean by that is some do very poor maintenance through the years and poor inspections. So long as you follow the maintenance rules and do good inspections then going on condition shouldn't be an issue. The maint. manual says do a compression test every 200 hrs. I do a leak down test every annual. just habit and only takes a few minutes. As the engine starts getting up there in hours or years do an oil analysis once a year at annual. It only cost $20. I use AvLabs out of Texas. They have a huge data base on Rotax engines and run each sample 3 times. They will send or email the results. If any thing is really bad they will call you. Just cheap insurance since my X-ray vision is going down hill at may age. :P

    You need to do the proper maint. on the gearbox and engine along the way and don't try and cut as many corners as you can. Unfortunately I see that a little too often.

    Age verses hours should play a part in your maint. decisions.

    Now that I have said that you may get some here that have pro overhaul views. Who's absolutely right, I guess the person you ask? In the US you are allowed to go on condition.

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

    Thank you said by: Roger Entwistle
      
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  • Re: 912 ULS 15 Years TBO

    by » 10 years ago

    Hi Roger,
    Could you tell me where to find in the manuals the leak down test?
    Thanks,
    Arnaldo
      
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  • Re: 912 ULS 15 Years TBO

    by » 10 years ago

    Hi Roger,

    Thank you for the information.

    Much appreciated.

    Claude
      
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  • Re: 912 ULS 15 Years TBO

    by » 10 years ago

    There is a very good video on performing a differential compression test:
    http://www.rotax-owner.com/en/videos-topmenu/elearning-videos/181-diff
      
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  • Re: 912 ULS 15 Years TBO

    by » 10 years ago

    Hi All,
    On the same TBO subject, my 912 ULS (S/N: 4426___) is 15 years old but has only 290 hours.

    What happens with the engines which are run very little should they really be overhauled on age condition?

    Sure I can extend to 15 years doing the bulletins but according to age it should be overhauled. What is your opinions please.

    Thanks in advance!
      
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