This quote is from a friend of mine who is
extremely familiar with this plane. He saw your post here and wanted me to post this for you, and hopes it helps.
(He has tried to register here, but they seem to be having issues with the registration process.)
Quote:"If you downloaded the aircraft directly from Project Tupolev itself, and it is "official", the flight manual is located here:
DRIVE LETTER:\Program Files (x86)\Microsoft Games\Microsoft Flight Simulator X\Project Tupolev\documents FS9\pttu154_94eng.pdf
Regarding the autopilot functions, there is an initial summary on page 34 of the manual. Please note that you must read the entire manual and set up the aircraft systems, and your physical flight control hardware, as specified. Failure to use the built-in joystick software, and failure to start up the aircraft systems correctly will lead to a multitude of problems such as this."