Check play in the main shaft I had same sort of problem, after a hard landing and the main drive pinion had sliped down the shaft allowing the main shaft move up and down. Moved the pinion back up the shaft to restrict movement and it became stable again, also check that the swash plate is still in position.
Check play in the main shaft I had same sort of problem, after a hard landing and the main drive pinion had sliped down the shaft allowing the main shaft move up and down. Moved the pinion back up the shaft to restrict movement and it became stable again, also check that the swash plate is still in position.
woody01256 4 months ago