Hello All,

 

I have been a PMDG user for some time and have begun to experience issues with my aircraft on an install on my new FSX rig.  

 

Some background:

 

I own the NGX, MD11, and 777X and have them installed on an older x79 SB-E rig as well as a newer z87 Haswell rig.  The SB-E rig is stable and always has been, the Z87 rig however is giving me fits with FSX.  All of my PMDG aircraft on my z87 rig experience uncommanded control deviations in autopilot.  Typically (this has been experienced in all 3 aircraft) I will have entered cruise flight and be functioning under autopilot when suddenly my aircraft begins an uncommanded pitch up or pitch down maneuver that ultimately becomes terminal to the flight.  

 

Attempted Remedies:

I have reinstalled all of the aircraft involved and done everything short of clean reinstall of FSX.

 

Possible causes:

Incidentally this rig is also suffering from a Win 7 time issue where I am unable to synchronize the system clock with a server and the computer cannot keep accurate time as a result.  I have confirmed my MB is ok as the BIOS clock is correct.  

 

Could system time being wrong somehow affect PMDG aircraft?

 

I am very close to doing a complete wipe of this computer and starting from scratch but for obvious reasons wish to avoid that if a fix is possible.

 

Please advise.

Tried disabling weather turbulance?

I have not but will now.

Rendi,

 

I made the adjustment and did a quick hop from KDFW to KPHX.  No autopilot funny business!  Interestingly my other rig had this option enabled as well without these issues.  It looks like the solution to the problem so far.  I will be testing with the MD11 and B777 over the next couple days to confirm the fix.

 

Thank you! :im Not Worthy:

I had the same issues with the Queen. I disabled winds aloft and this took care of it. Later for some reason I was able to use them again with no ill effects.

As usual, I have to jump in and say the following, since I saw it mentioned earlier:

 

Uninstall/reinstall should be the last possible resort, as it may cause more issues than it's attempting to solve.  Additionally, it does absolutely nothing to help troubleshoot the issue.  If the problem doesn't appear later, it's normally written off as "fixed by the uninstall/reinstall," when in reality, it could be any number of things.  When it reappears, the first inclination may be another uninstall/reinstall, when in reality it may be a simple fix that's being overlooked.

 

As always with computers, the answer is usually a lot simpler than it's being made out to be.  Uninstall/reinstall is not necessary 99% of the time.

I always disable wind aloft / variation etc from FSUIPC and also disable turbulence effect on aircraft from display settings whenever I fly PMDG aircraft, that's the only thing I've found to stop autopilot from doing stupid things. If I remember right I didn't have too many issues with altitude variation though, just random S turns. 

 

 

Regards

 

Joona L 

 

 

I will have entered cruise flight and be functioning under autopilot when suddenly my aircraft begins an uncommanded pitch up or pitch down maneuver

 

Curious, I had this happen once yesterday for the first time ever in the NG during climb, it actually broke the autopilot FCC so that channel could not be re-engaged, what weather program and joystick do you use?