I would upload videos here but it only allows 7.81MB. I have the same problem. RPM aren't going above 431 on cold start and if you start at a runway engine constantly going down and up down and up. I have few aircraft bought from different developers and this is the first time I can't use one. I have dissconnected all peripherals and restarted the game several times and the problem is the same. With XBOX controller, Keyboard and mouse, with MOZA, with TurtleBeach. All the same. F406 by iniBuilds is just not usable at all for me. I tried passanger and cargo variants and it's all the same. UPD: If you start from runway and your throttle at 100% you have RPM and TORQUE oscillations going up and down. Only at throttle lever 93% and below it is table and not losing/gaining power. If you put it 94% or above it start going down and up and down and up.