A professional of my acquaintance in northwestern Aussie had a terrible experience with a Super Cub - shortly after takeoff roll control was lost, fortunately wings-level. He was able to land correctly - on examination he found that his predecessor had replaced aileron cables with *ropes*. When the walkround and cockpit checks were done, the control action seemed OK, but once in the air a knot jammed under a spar....
(Background: the incident took place on his last job before I met him, on a station in the northwest corner of the NT. This was the first flight of the job - hence the horrid discovery)