Hello, I am experiencing a problem with the CS 767's LNAV. I programmed the FMC, however when I takeoff and turn the Autopilot and LNAV on, that aircraft starts rocking from side to side. Any suggestions on how to fix this would be greatly appreciated.

Does it correct when you disengage and quickly reengage the AP? I had to roll back to an earlier version of FSUIPC and that fixed the problem. I don't think Captain Sim has completely broken the code on FSUIPC and that has been the source of some of the issues some people experience. I don't know why some versions would act better than others, but it does seem to be the case. The 767 is the only one I have seen this kind of rocking on, i.e. immediately upon turning AP on. PM me for further info,

i've problem with that but in a different way,when i eangage LNAV,plane does not turn and it has not any reaspons to eangaging any key,and the bad point is i have a same problem with VNAV too!please somenoe give me an answer to what do i have to do

I know they have fixed many issues with the recent service pack 5http://www.captainsim.com/products/b767/sp5.htmlYou might try this....if you aren't running it already....

This has been covered several times in the Unofficial Captain Sim Forum here at AVSIM. If the FSUIPC is not installed properly, the rocking will definitely happen. You should run a repair by double-clicking on the setup program and selecting repair when the options are shown. Best regards,Jim