Somebody correct me if this is not right, but I am under the impression
that the trim wire is stainless.  IF that is correct, your wire did not
rust.

 

I have a suspicion that your trim cable was "abused" during the removal
of the elevator and or horizontal stabilizer and that either the wire or
the sheathing was crimped or possibly both.

 

Let's look at the facts:

It worked when you took it in.  It didn't work when you picked it up.
The only "reasoning" offered was that the plane set outside for a couple
of days and a stainless steel wire "rusted" in that two or three day
period.  They also said that it was "stiff" when they put it back
together after painting: did it also "rust" inside the paint shop?  It
just doesn't quite add up.  What does add up is that the wire or sheath
or both were damaged in that shop (it's not that hard to do).  Bottom
line is that the paint shop should foot the bill regardless if the time
to replace is an hour or a week.  

 

As for the time required; with no problems a wire can be replaced in
less than an hour.  If the transition between the coiled sheath and
guide tube give problems, it could be a half day.  I did one in about 45
minutes.

 

You will want to have your guy do it for a couple of reasons:

1.  The people at that shop seem to be clueless

2.  If, by chance, the back of the plane has to be opened up and
something else that needs to be done is noticed, you will be in the
right place, with the right person to have it taken care of.

 

While you're looking around the trim area, make sure the hinges and
springs on the trim tab haven't been painted over and glued in place.

 

Good Luck

 

Tommy

 

 

 

 

________________________________

From: [email protected] [mailto:[email protected]]
On Behalf Of Linda Abrams
Sent: Thursday, December 17, 2009 8:18 PM
To: [email protected]
Subject: [ercoupe-tech] trim cable wire

 

  

When I took my plane to the painters (day before Thanksgiving) the 
trim was working fine. When I picked my plane up from the painters 
on Monday, the trim wasn't working. It felt stuck: the control 
handle bounced back when I tried to move it into position to (e.g.) 
trim nose down, instead of its normal movement.

I took it back to him today. He said that when they'd put the 
control surfaces back on, he found the cable was stiff (rusty?) so 
they lubed it and then it worked, but after they finished the 
painting it rained for several days and (since I couldn't some get it 
in the rain), they put the plane outside the hangar (the next 
customer's plane had to go into the hangar for stripping). They 
figured it had rusted up again and was binding.

So in front of me, the painter & his AI sprayed some lubricant on the 
tail end of the wire, where it comes out of its sheathing, took off 
the covering of the trim control handle at the other end, so the 
handle mechanism was exposed, then kept trying to force it to work. 
Long story short, they broke the trim wire right up near where it 
attaches to the trim control handle. (I'd guess it broke from metal 
fatigue of him repeatedly trying to force it loose using the control 
handle.)

So of course they're saying, "The wire was old and rusty and you're 
better off replacing it with a new one." Well, now I don't have any 
choice but to do so! I ordered the wire itself from Skyport; it is 
not expensive, but the labor looks to be. The painter's AI said only 
"less than one day" to install it, and that "if it's less than 3 
hours, [he] wouldn't believe it." The young mechanic who usually 
helps me at my home field isn't available (away for the holidays), 
and I haven't yet been able to reach the AI who usually does my 
annual so I don't know if he's in town. IF I'm stuck with the 
painter's AI doing this
(a) how long should the labor take, and
(b) is there anywhere in our online resources that shows 
how? I've looked in the Service Manual and can't find anything. 
(Hartmut: is there anything on this in your photo collection?)

Linda
N3437H (Sky Sprite)
L.A.



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