Juan Browne over at blancolirio notes that the Bell 206L is not prone to mast bumping, and his analysis suggests a failure at the mounts that hold the transmission to the helicopter frame or catastrophic seizure of the transmission itself.<p><a href="https://www.youtube.com/watch?v=U8Q8XuqlyMQ" rel="nofollow">https://www.youtube.com/watch?v=U8Q8XuqlyMQ</a>