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Turbo Controller Leaking Oil: Saga on 1980 A36TC

This has been a saga that has lasted since our last Engine Overhaul 3 years/700 hours ago. Turbo Controller leaks a fair amount of oil near where it attaches to mounting bracket in board. We have gone through 3 different controllers and a few overhauls of the controller, yet the leak is still there. I don't know if our A&P might be doing something wrong during the install? He is very experienced with Bonanza's and Turbo Systems, so I do have a lot of trust in his skills, knowledge and experience. The most recent controller is a Factory Remanufactured unit from Hartzell since they bought the STC to do that. My A&P is suggesting that the quality of these overhauled units is just low and that is it, but I am thinking there must be something else we can look at.

Any advice would be greatly appreciated.

N36LM-TurboControllerLeak.jpg - 275.5 KB

Model: Bonanza A36TC
Aircraft Serial Number: EA-67
Posted 8/23/2021 - 1 month ago
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Assuming the seal on the inlet fitting (top of photo) has been changed to try to eliminate the leak? Is it tightened correctly?

Mike
ABS Tech Advisor

Posted 8/23/2021 - 1 month ago
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He did replace the seal on the most recent install (and it has been replaced before during this saga). He has stated to me that he has followed the documented installation procedures, so I suspect it is tighten correctly. But I will mention it to him and see what he says. Is it common to miss-tighten it ?

Posted 8/23/2021 - 1 month ago
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I have run in to folks that think they are supposed to be a swiveling fitting. Not trying to point a finger at your A&P, we are all in a learning process, but it sounds like you should have ruled out about anything but an installation problem.

Posted 8/23/2021 - 1 month ago
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I will share this information with my A&P and let you know what comes out of it.

Posted 8/24/2021 - 1 month ago
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Turbo Controller Leaking Oil: Saga on 1980 A36TC