Safety Flash
Shackle failure during over-boarding of pennant wire and ballast chain
Shackle failure during over-boarding of pennant wire and ballast chain
- IMCA
- Safety Flash
- IMCA SF 31/21
- Crane and RiggingLifting OperationsLine of FireMarine Operations
- Line of fireMechanical failure
- Anchor handlingInspection and maintenance
- Lifting accessoriesWinch
- Management of changePreventive maintenanceRisk assessment
- Marine industry
- Vessel
Summary
A shackle failed while ballast chain and pennant wire were being over-boarded from an anchor-handling winch. Released chain damaged nearby equipment, with nobody harmed. Evidence suggested the shackle nut became trapped in a chain link. The account identifies shortcomings in connection arrangements, maintenance, risk assessment and management-of-change documentation.
Classifications: Line of fire; struck-by hazards.
Classifications: Mechanical failure; equipment failure.
Classifications: Anchor handling; anchor deployment.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Lifting accessories; lifting gear; rigging gear.
Classifications: Winch; winches.
Classifications: Management of change; MOC; change management.
Classifications: Preventive maintenance; preventative maintenance; planned maintenance.
Classifications: Risk assessment; hazard assessment.
Classifications: Marine industry; shipping industry; maritime sector.
Classifications: Vessel; aboard ship; onboard vessel.
Summary
During over-boarding of the pennant wire and ballast chain from the main anchor handling winch over the stern roller, there was a failure in the chain link / 35t shackle
IMCA SF 31/21. Themes: crane and rigging, lifting operations, line of fire, marine operations.