engine revs decline to idle about every 0.5 seconds. never goes to zero. when I disconnect all peripherals (rudders,. stick, yoke, throttle quad) and the mouse has no configuration, keyboard is on keyboard profile, the problem persists.

I confirm the throttle assembly disappears when the problem occurs and the revs drop to idle.

If I can get off the ground by assiduous clicking with the mouse and driving through kilometres of trees, the problem goes away. the throttle stays where set without dropping to idle on both mouse and throttle quadrant.

Throttle issue does not occur on any other aircraft in FS2020

Hardware is very capable. 32Gb 12900 CPU, RTX 4060 3 monitors