hankk
New Member
Posts: 15
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Post by hankk on Sept 18, 2018 18:34:58 GMT
My trim servo recently failed. Apparently the way it is mounted with the drive arm up, water can get into the housing. The best answer I can come up with is to create a little dam with latex caulk. I won't stop it but it should mitigate it some. Wondering if anyone has had problems and what they did to solve it, if anything. Someone suggested drilling a hole in the case but I don't think that is a great idea since the water still gets to the components inside the case. Attachments:Trim servo mounting.odt (62.72 KB)
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John
Junior Member
Posts: 74 
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Post by John on Oct 18, 2018 14:38:11 GMT
Hank,
Check with Garmin warranty. I recently had a servo failure in my 2017 P2008. Garmin replaced both servos under warranty. As I recall Garmin said the problem was with oil used in the servos.
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Post by ChiMike on Oct 20, 2018 20:06:18 GMT
Hank,
What was the outcome of your issue?
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hankk
New Member
Posts: 15
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Post by hankk on Feb 19, 2019 15:49:34 GMT
Nothing like a quick reply, sorry. I replaced the servo and so far works just fine. I am thinking there is a new servo motor that would be better so next time I will do a little more research. The new servo is identical to the one replaced so I am thinking it will eventually fail.
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Post by ChrisConnor on Mar 3, 2019 20:48:34 GMT
I recently read some posts somewhere about the trim servos made by RC Allen having to be replaced. Is this the same topic?
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Post by lufty8898 on Mar 3, 2019 23:24:21 GMT
Drilling a small.hole.in the bottom.of the case allows the water to drain out. This stops the water pooling in the case and corroding the mechanism.
Since making drilling a hole on two aircraft it has resolved the problem.
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hankk
New Member
Posts: 15
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Post by hankk on Mar 5, 2019 4:43:33 GMT
I was hesitant to drill a hole in the case, not really sure why but that would be a solution to a poor design, I think Chris is right and there is a new and improved servo motor. The original one was fine but it is mounted with the drive rod up which allows water to enter. I think I read somewhere the now recommended one is sealed.
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hankk
New Member
Posts: 15
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Post by hankk on Sept 28, 2019 2:43:29 GMT
OK, so here I go again. Elevator trim failure. The servo was filled with water and rusty. As you can see from my last post I replaced the trim motor less than a year ago. I have now purchased a new one from Aircraft Spruce and will probably drill a hole in the bottom to keep the water drained. The design is very poor and I'm disappointed in Tecnam for this one. I'm thinking there may be a better replacement servo than the T2-10A that cost me another $167. If anyone knows of a better replacement please let me know. Whether I drill a drain in the servo or not, eventually it will fail again. There is no good way to keep water from entering in it since the shaft is mounted upward and if flying in rain the servo is going to get a deluge.
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Post by Ed Midgley on Sept 28, 2019 13:14:21 GMT
Not sure what model Tecnam you fellows have but, my 2014 P2008 ser #085 has a Ray Allen B6-11C trim motor which is water proof. You can look it up on their site. It appears to be the same size.
I have all kinds of autopilot trim problems and did replace the trim motor. I took the old one apart and found no signs of water ever being in it. It had over 550hours on it.
I’m still working with Garmin on the trim problem but, I’m sure the trim motor is not the problem it’s the power coming from the autopilot that’s causing my problem.
Ed
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