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Not sure I'm on the right place for this but I thought I would share something. I have a cavalon gyrocopter with a 914 in it. It seems that I was blowing oil all over the tail fin in flight. But on the ground I could find no leak. I cleaned the engine compartment up and tried running it on the ground but no luck. Time and time again. It was only until I ran it up to about 4500 RPM that I discovered the O-ring on the turbo sump was leaking. Just FYI.
  • Re: Oil leak (914)

    by » 7 years ago


    Hi Jeff, watch the video on the turbo oil system, you will discover why it does this. Mine did at first, then I re-seated the ball bearing in the oil check valve, and haven't had any leaks since then (about three years).

    Thank you said by:

  • Re: Oil leak (914)

    by » 7 years ago


    Thanks, I also replaced the brass washers on the oil lines under the oil pump, but I do not know how to find the torque on the banjo bolts.

  • Re: Oil leak (914)

    by » 7 years ago


    Thanks, I also replaced the brass washers on the oil lines under the oil pump, but I do not know how to find the torque on the banjo bolts.


    Look in the Heavy Maintenance Manual. See section 79-00-00

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