I had the exact same problem.  Turned out to be the pump that is connected to the starter drive that pulls the oil from the turbos.  I found this out after replumbing the lines, testing the check valve, and replacing both turbos - and still had the problem, which was a major pain.  Allen at Barrett was very helpful but couldn't believe this pump could be the culprit.  After eliminating everything else, it was the only thing left.  Have run the engine 100 hours since then and doesn't leak a drop.  

Bob R
IV-P

On May 31, 2013, at 7:35 AM, John Barrett <2thman1@gmail.com> wrote:

> I have oil dripping out of turbos in this recently overhauled engine - done by Barrett in Tulsa OK.  Last run was about six minutes to see if electronic ignition is working.  Found a little oil puddled on the Tarmac under each stack and can be seen to eminate from the turbos.  Total time since reinstall is about 15 minutes, none of it higher than mag check RPM.
>
> My question is are the turbo oil return lines plumbed with a check valve?  Could a backwards hookup of these produce this result?  I didn't have this problem with the Performance Engine version that I flew for about 55 hours.
>
> Thanks,
> John Barrett
>
> Sent from my iPad
>
>
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