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Norm,

 

A couple of times I had similar problems with my trim, just in the opposite direction.

 

My A&P detached the core wire and pulled it out of the housing.

 

Once, he just put the core wire back in wiping it with a lubricated rag.  This lasted a number of years.

 

The other time, he put a slightly heavier gauge core wire back in, again rubbing it through a lubricated rag on the way in.  That second time seemed to last better.

 

I don’t know what kind of lubricant he used, whether it was simple oil or something more exotic.

 

Be aware that not all aircraft have a cable housing the entire length of the travel.  If that’s the case, it’s much harder to put the cable back in.  You might want to check that before pulling the wire.

 

Be absolutely sure the cable is well attached, especially at the tail.  One Ercoupe was lost and the crash investigator thought it was due to the trim cable coming loose on a plane with a weak trim-tab spring.  He thought that let the trim tab fly loose and let the elevator flutter.  Bad, bad outcome.

 

At the very least, make sure you have a strong enough spring on the trim tab before you reattach the trim cable.  (Sorry, I don’t know how you’d define “strong enough” for the trim tab spring.)

 

Ed Burkhead

http://edburkhead.com

ed -at- edburkhead???.com          (change -at- to @ and remove "???")

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