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?
 

GyrOZprey

Aussie in Kansas.
Joined
Aug 8, 2011
Messages
3,058
Location
Whitewater KS
Aircraft
Butterfly Aurora N5560Z / Titanium Explorer N456TE & N488TE/ - trained in MTOsport 446QT/488FB
Total Flight Time
845
seals in your ram up on mast???? the flight side of the brake-flight unit .... switch- behind panel!?
 

Eric S

Junior Member
Joined
Dec 22, 2012
Messages
155
Location
Kingsland, TX
Aircraft
Sport Copter Vortex & AAI (Sparrowhawk) RAF
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
 

rdeigsler

Newbie
Joined
Mar 3, 2021
Messages
5
Location
Hurricane, Utah
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.
 

Housedr

Newbie
Joined
May 26, 2019
Messages
42
Location
Massillon
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.
 

Barry M14

Member
Joined
Aug 8, 2014
Messages
79
Location
Hampden, Ma.
Aircraft
American Ranger AR1
Total Flight Time
1,500 +
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
 

Barry M14

Member
Joined
Aug 8, 2014
Messages
79
Location
Hampden, Ma.
Aircraft
American Ranger AR1
Total Flight Time
1,500 +
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.
 

Tyger

Super Member
Joined
Nov 25, 2017
Messages
988
Location
Germantown, NY
Aircraft
Magni M16
Total Flight Time
360
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.
 
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