St. Petersburg Russia A Self Erecting Tower Crane collapsed during a dismantling process. The 25 year old owner of the crane was on the top of the crane when the failure happened. He was thrown a reported 50 meters and was transported to the hospital with multiple injuries that were life threatening.
The cause of the accident wasn't official, but the story at the release of the article was that somone whom was charged with removing the lock nuts, removed the whole nut to some bolts. As you may expect, we appear to have human error as being the cause of this crane failing during a dismantle.