April 4, 20206 yr Hi everyone, I had some issues with the autopilot during my previous flight, from Glasgow to Seattle with PMDG 747. I was cruising at FL380 with LNAV,VNAV and CMD set and after 3 hours flying normally the AP went crazy: The aircraft started to turn to the left with constant bank angle of 5* ( F/D was inviting me to turn to the right following the FMC) and the altitude was fluctuating between FL380 and FL370, I tried to disconnect the autopilot but It didn't let me take control of the aicraft, so I renstalled PMDG 747 and made a test flight along another route ( Milan LIMC - Male VRMM) and the aircraft didn't have any problem for the whole flight. I tried again Glasgow - Seattle: same issue as before. I noticed It happens always while I'm closed to the 70N parallel. Any ideas? I really want to fix it....
April 4, 20206 yr You might do better to post this in the Avsim PMDG User to User forum. More likely to get an 'expert' response. Edited April 4, 20206 yr by Biggles2010 John B
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