BSEE: Unsafe crane working practices result in injury

A lead mechanic suffered a severe leg injury while performing a boom tip changeout on an offshore pedestal crane. He and his assistant deviated from the planned scope of work, failed to rig up the mid-section to the bridle (Figure 1) prior to removing the mid-section to boom tip connector pins (Figure 2), and failed to use boom connector safety pins (Figure 3). After removing the bottom right pin, both employees assumed the bottom left pin would be difficult to remove since it was bearing the weight of the boom section. When the lead mechanic struck the remaining connector pin, it unexpectedly ejected, causing the boom to drop and pinning his leg against a sledgehammer and grating (Figure 4), fracturing his tibia.

Facility personnel used a pallet jack, a piece of two-inch pipe, and a two-by-four piece of wood to lift the boom tip and pull the lead mechanic from under the boom tip and  then administered appropriate first aid.

The response of the facility personnel was critical in providing lifesaving interventions until treatment could be provided at the hospital on shore.

The company’s incident investigation found that the root causes were:

• The Job Safety Analysis (JSA) was only completed by one employee and did not include rigging up the mid-section to the bridle prior to removing pins or the use of safety boom connector pins. In addition, the lead mechanic signed off on the JSA without actually reviewing it.
• There was no requirement for onshore management or the crew to review the JSA before starting work.