cferr59 Posted March 19, 2020 Report Share Posted March 19, 2020 Hello, I have a PC system in my M20C and had an issue with it on a few occasions. When I return to level from a banked turn, the system wants to turn left and I have to fight it or disengage it. This occurred after both a right and a left turn. After about a minute or so, it will stabilize and stay wings level. The AccuTrak and AccuFlite were both off when this happened. Last night, I took a flight performing a number of left and right turns with and without the disengage button pressed including a steep turns and I was not able to get this to happen again. It is an intermittent issue and I can overpower it or disconnect it with the button, but I am concerned this will happen in IMC where it could pose a larger problem. Any thoughts on what to check? Thanks, Chris Quote Link to comment Share on other sites More sharing options...
Davidv Posted March 19, 2020 Report Share Posted March 19, 2020 9 minutes ago, cferr59 said: Hello, I have a PC system in my M20C and had an issue with it on a few occasions. When I return to level from a banked turn, the system wants to turn left and I have to fight it or disengage it. This occurred after both a right and a left turn. After about a minute or so, it will stabilize and stay wings level. The AccuTrak and AccuFlite were both off when this happened. Last night, I took a flight performing a number of left and right turns with and without the disengage button pressed including a steep turns and I was not able to get this to happen again. It is an intermittent issue and I can overpower it or disconnect it with the button, but I am concerned this will happen in IMC where it could pose a larger problem. Any thoughts on what to check? Thanks, Chris I usually just restart microsoft flight simulator when my PC is giving me an issue. Quote Link to comment Share on other sites More sharing options...
Hank Posted March 19, 2020 Report Share Posted March 19, 2020 @cferr59, your Disconnect Valve sounds like it may need to be cleaned. 1 Quote Link to comment Share on other sites More sharing options...
Browncbr1 Posted March 19, 2020 Report Share Posted March 19, 2020 (edited) If there is a leak on left or right side of the system, it will turn away from that side. If there is vacuum loss, it will turn whichever way your rigging wants to go or will be sluggish to respond. If your TC is messed up, no telling. I would start by checking vacuum on the right side of your system. Usually these things can be fixed with some electrical tape. Edited March 19, 2020 by Browncbr1 2 Quote Link to comment Share on other sites More sharing options...
chriscalandro Posted March 19, 2020 Report Share Posted March 19, 2020 Sounds like a leak in the right boot or hose. Check connections and check boot. If it’s leaking from the boot the approved fix is electric tape. Quote Link to comment Share on other sites More sharing options...
Shadrach Posted March 19, 2020 Report Share Posted March 19, 2020 If it’s intermittent, I would verify rigging first. Disconnect the PC and verify rigging. It’s unusual for a leak to be intermittent. When it is it’s often caused by something else moving a component of the PC. 1 Quote Link to comment Share on other sites More sharing options...
chriscalandro Posted March 19, 2020 Report Share Posted March 19, 2020 If it’s a slow leak it would do this after pressing the dump valve and the left tightens faster than the right. 1 Quote Link to comment Share on other sites More sharing options...
cferr59 Posted March 19, 2020 Author Report Share Posted March 19, 2020 Thank you everyone for the advice. I inspected the lines as best I could and the aileron and rudder servos. I found that the forward rudder servo (the one with the red line) has a small tear in the boot. I am somewhat skeptical that this is the cause due to the intermittent nature of the issue, but it seems to me that this needs to be fixed before further troubleshooting. Fortunately, I have 2 spare rudder servos so that isn't a big issue. I'll report back once it is swapped and I have a chance to take a few flights and try to repro again. Quote Link to comment Share on other sites More sharing options...
Browncbr1 Posted March 19, 2020 Report Share Posted March 19, 2020 1 hour ago, cferr59 said: Thank you everyone for the advice. I inspected the lines as best I could and the aileron and rudder servos. I found that the forward rudder servo (the one with the red line) has a small tear in the boot. I am somewhat skeptical that this is the cause due to the intermittent nature of the issue, but it seems to me that this needs to be fixed before further troubleshooting. Fortunately, I have 2 spare rudder servos so that isn't a big issue. I'll report back once it is swapped and I have a chance to take a few flights and try to repro again. Sounds like you’ve found the problem. Rudder will definitely cause it to turn. I’ve heard that flexseal tape works great on rubber boot tears.. Quote Link to comment Share on other sites More sharing options...
chriscalandro Posted March 21, 2020 Report Share Posted March 21, 2020 @carusoam huh? I do a lot of giving... Quote Link to comment Share on other sites More sharing options...
carusoam Posted March 21, 2020 Report Share Posted March 21, 2020 9 minutes ago, chriscalandro said: @carusoam huh? I do a lot of giving... leave out the negativity, and the world is a nicer place... People will appreciate YOU, even better. Best regards, -a- Quote Link to comment Share on other sites More sharing options...
Hank Posted March 21, 2020 Report Share Posted March 21, 2020 2 hours ago, carusoam said: leave out the negativity, and the world is a nicer place... People will appreciate YOU, even better. Best regards, -a- While I certainly agree with the sentiment, I'm confused by its appearance here . . . . Quote Link to comment Share on other sites More sharing options...
chriscalandro Posted March 21, 2020 Report Share Posted March 21, 2020 It probably takes longer to explain than its worth. Quote Link to comment Share on other sites More sharing options...
Browncbr1 Posted March 21, 2020 Report Share Posted March 21, 2020 2 hours ago, carusoam said: leave out the negativity, and the world is a nicer place... People will appreciate YOU, even better. Best regards, -a- I recommend the block feature for that user. I’ve really enjoyed not seeing anything he posts. Quote Link to comment Share on other sites More sharing options...
chriscalandro Posted March 21, 2020 Report Share Posted March 21, 2020 ^^ I’ve really enjoyed not having to deal with his BS after reading my posts. anyway, glad you found your problem. Quote Link to comment Share on other sites More sharing options...
cferr59 Posted March 22, 2020 Author Report Share Posted March 22, 2020 I flew for about 7 hours yesterday and didn't have an issue so I am hopeful it is resolved. 2 Quote Link to comment Share on other sites More sharing options...
carusoam Posted March 23, 2020 Report Share Posted March 23, 2020 7 hours is a great test! How far did you go? Best regards, -a- Quote Link to comment Share on other sites More sharing options...
cferr59 Posted March 23, 2020 Author Report Share Posted March 23, 2020 Philly to Charlotte Monroe Executive and back. VFR on both ends, but I had to land in Charlottesville and file an IFR flight plan due to unexpected low ceilings enroute. 1 Quote Link to comment Share on other sites More sharing options...
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