Dangerous incident: winder main skip

While carrying out maintenance, a winder main skip made contact with a davit arm. The arm had been used to prepare for maintenance and when the winder was operated it struck the davit arm.
Recommendations to industry: Any item that has the potential to enter the shaft or be left in the shaft should have a way of being secured. Checks that all items have been secured should be included in procedures before a winder is returned to service following maintenance.