The International Cessna^® 170 Association

During the last annual on the old Alaska Bush Plane we found a cracked horizontal bulkhead just under the horiz stab which required a disassembly of the aft end control surfaces. The elevator trim wheel indicator now points to a position aft of the old position. All angles on the trim tab are correct when the wheel is moved to its forward and aft limits, it's just the pointer doesn't point to the "green band" it use to point to. How is this pointer repositioned?

I just took mine apart and it's so simple, it's genius.

The side of the wheel has a spiral groove cut in it (I always thought they were decorative circles) The trim indicator thingy rides in this groove.

To adjust it, Set the trim neutral on the tail and take out the 5 screws that hold the side of the trim wheel plate on.
Remove the side plate, adjust the trim indicator thingy to the position you want and put the thing back together being careful to get the indicator in the groove.

Before doing this, make sure you have enough links on the trim chain for full travel. If the needle is off, you might not be centered on the chain.

That's slick. I love it when something isn't over-engineered.

Before taking it apart, I couldn't fathom how it worked.
As soon as I took the cover off, it was a revelation.

As Goldie used to say.... Grooovey...