Planes, like birds like to roost. I have found an arborist throwing weight is the best tool to chase them back out. I wound up buying arborist line too.. i originally tried paracord, but it gets stuck in bark - where the arborist line just slips over branches. The way to use it is to toss the weight (with line attached) over the branch the plane is stuck on. Let the weight drag the line down to the ground and hold both ends of the rope while pulling down and shaking the branch. Usually doesn't take more than a few minutes to drop it down.