The crew was preparing to move two gas racks from the deck. While moving the gas racks the crane block started swinging in an uncontrolled manner. The Crane Operator, in an attempt to regain control, boomed up causing the crane to reach the boom upper limit. However, the continual swinging of the block resulted in it hitting the upper crane pedestal walk-around grating several times.
Once the upper limit was reset by the Electronic Technician, the Crane Operator was able to park the crane in the boom rest and exit the crane cabin to start inspecting the upper crane walkway for damage. During the inspection, the Crane Operator stepped onto a piece of grating causing it to flip up and fall 58 feet (17.6 meters) to the main deck below. As the grating flipped up the Crane Operator managed to grab part of the upper walkway structure and fell 15 feet (4.5 meters) to a staircase below resulting in a fracture of his left leg.
Grating was not properly secured, allowing it to become dislodged when hit by the crane.
Damaged site not secured and inspected.
What Can We Learn?
A Questioning Attitude could have stopped the crane operator from walking through the damaged site prior to having it inspected.
The Physical Environment the Injured Person (IP) was working in was damaged by the uncontrolled swing of the crane.
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