PC Aviator wrote on Oct 12^th, 2018 at 12:03am:

That seemed to fix my ACE. However, after 1 hour of flight time, the aircraft shut off again: both engines. Lost all electrical and hydraulic power at FL39'0. Was able to restart by FL31'0 but it shouldn't be doing this. Of course this was online with VATSIM. Was not a problem with the original release but the updates seem to be an issue at least for my installation. Is this a known issue? Is anyone else having this problem? Most importantly, is there a fix? Please?

Do you have any Mixture Axis assigned to your controllers? I had a similar problem because of spikes on my CH Throttle quadrant.