Pneumatic trim leak

rdeigsler

Newbie
Joined
Mar 3, 2021
Messages
5
Location
Hurricane, Utah
I have a 2012 MTO Sport. The trim loses pressure in flight and I am having to add pressure frequently. On the ground the pressure holds. I have checked all the connections that I could find. Any ideas of where to look for the problem?
 
seals in your ram up on mast???? the flight side of the brake-flight unit .... switch- behind panel!?
 
I have a 2012 MTO Sport. The trim loses pressure in flight and I am having to add pressure frequently. On the ground the pressure holds. I have checked all the connections that I could find. Any ideas of where to look for the problem?

Put a little dishwashing liquid and water in a spray bottle. Spray all of the connections while it's pressurized and I bet you'll find it.

Eric
 
Put a little dishwashing liquid and water in a spray bottle. Spray all of the connections while it's pressurized and I bet you'll find it.

Eric
Thanks Eric, that was my next step but wanted to be careful not to damage anything around the electrical wad near the compressor.
 
I have a 2012 MTO Sport. The trim loses pressure in flight and I am having to add pressure frequently. On the ground the pressure holds. I have checked all the connections that I could find. Any ideas of where to look for the problem?
Its the seal on the pneumatic cylinder. Simple 15 minute fix. Autogyro has a seal kit $30.
 
You are the man! Worked beautifully, rock steady trim pressure in flight. Thanks again!
I would lose pressure every three or four months but I never had to replace the seals just clean them up and it would go another three or four months before it got dirty. After a few times of doing that I covered the whole cylinder with a sock to keep it clean and it lasted at least two months longer
 
Sure sounds like a lot of bother...
At first I thought it was but after two or three times it took less than five min. to take off after a flight. I would take it home to take it apart and clean it up. That would take about 15 min. Then when I went back to the airport another 5 min to put it back together
I always use my trim during my flight so as I can fly hands off so when it lost pressure it bothered me more then cleaning it.
 
I agree not having trim can be an even bigger bother.
My trim is just a little electric motor hooked up to a wire and spring. Nothin' fancy, but pretty reliable so far.
 
Can anyone help me please. When l go down the runway to take off. I move the stick back. I am having trouble pushing the stick forward. I need to use both hands. I have changed the pneumatic cylinder nothing has changed the flight switch is on. I have no idea what the problem is or could be can you help
 
On my air trim cylinders there are tension adjustment nuts.
Thry clamp around small bars that are on the cylinder.
If your system is similar you might check these?
 
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