NEED (good) ADVICE on Hard Trim Repair/Mechanic

[CMMPilot]

I need a good recommended mechanic or shop to solve a long standing issue I have had with my trim.  Has a hard spot that we can't isolate and is causing the Auto Pilot (Century 41) to disengage. I am based in Florida, but am willing to fly just about anywhere to get this done by someone who knows and understands Mooney's. I've been to 2 avionics places in FL and we have done a myriad of tests, servo swaps, reprogramming, lubricating, cleaning, worm gear overhaul, bearing rehab, etc... and still have the issue. Too much money down the drain on all the obvious things and I feel we have to be missing something simple at this point.  Or we need to remove the entire tail to check the pivot points...

I have a beautiful 1980 M20K 231 Turbo. 

If you know of anyone who might have experience with this issue, please let me know. I thought about flying it to the San Antonio TX area, as this seems to be the hotbed of Mooney World, I just need recommendations so I can start making some calls. Thanks in advance!

Chris

[PT20J]

What's up with the reverse font?

I'd suggest Don Maxwell https://www.donmaxwell.com/ or the Mooney Factory Service Center https://www.mooney.com/

[CMMPilot]

Good places to start.

Thanks!

[Fritz1]

I had an issue with the autopilot disengaging at high altitude, low temp high power cruise and aircraft zooming up, lubing the tail pivot bearing, this is the bearing that pivots the entire tail with triflo solved the elusive issue, keep fingers crossed

[Pinecone]

I would start with a Mooney savvy mechanic to clean and relube the entire trim system.

I use @jetdriven.  But KGAI is a bit of a haul for you.

[Shadrach]

15 hours ago, CMMPilot said:

I need a good recommended mechanic or shop to solve a long standing issue I have had with my trim.  Has a hard spot that we can't isolate and is causing the Auto Pilot (Century 41) to disengage. I am based in Florida, but am willing to fly just about anywhere to get this done by someone who knows and understands Mooney's. I've been to 2 avionics places in FL and we have done a myriad of tests, servo swaps, reprogramming, lubricating, cleaning, worm gear overhaul, bearing rehab, etc... and still have the issue. Too much money down the drain on all the obvious things and I feel we have to be missing something simple at this point.  Or we need to remove the entire tail to check the pivot points...

I have a beautiful 1980 M20K 231 Turbo. 

If you know of anyone who might have experience with this issue, please let me know. I thought about flying it to the San Antonio TX area, as this seems to be the hotbed of Mooney World, I just need recommendations so I can start making some calls. Thanks in advance!

Chris

Worm Gear Overhaul?  Are you saying the enclosed jackscrew in the tail has been ovehauled? If you have a "hard" spot in one place through out the trims travel, the jackscrew would be my first check.  There is enough play in the trim shafts and joints running to the tail for you to determine which side of a shaft the resistance is on. You will likely need a helper, but should be able to tell pretty quickly if the bind is in the tail or in under the cockpit floor.

[PT20J]

On my J, one of the trim wheel chain sprockets is slightly eccentric and if the chain is too tight it binds at one spot every revolution of the trim wheel. Easy to check by removing the chain cover and observing the slack in the chain as the trim wheel is rotated.