Coming back to this topic:
When I fly the 777-300ER, it can’t stabilize the aircraft at cruising altitude.
I’m stepclimbing, not going too slow or too fast (M.84), my ascent rate wasn’t too high and I’m not too heavy
My plane is going up to (-)700 fpm and back down, it just can’t hold it’s current altitude
I’m sure that many of you have the same problem.
Also note: this only happens on the 300ER variant.