Safety Flash
High-potential near miss: Uncontrollable movement of auxiliary whip line
High-potential near miss: Uncontrollable movement of auxiliary whip line
- IMCA
- Safety Flash
- IMCA SF 04/23
- Crane and RiggingLifting OperationsLine of Fire
- Dropped objectsLine of fireMechanical failure
- Inspection and maintenanceLifting operations
- CraneLifting accessoriesWire rope
- Exclusion zonesIndependent audit and verificationOperating and work proceduresRisk assessment
- Marine industry
- Vessel
Summary
A vessel crane near miss involved uncontrolled auxiliary-line movement during start-up following water damage to its encoder. The wire parted, ejecting the block and hook before they fell to the deck; nobody was harmed. Lessons address encoder replacement, crane inspection, hook storage and revised procedures, risk assessments and personnel barriers.
Classifications: Dropped objects; falling objects; DROPS.
Classifications: Line of fire; struck-by hazards.
Classifications: Mechanical failure; equipment failure.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Lifting operations; load lifting; hoisting.
Classifications: Crane; cranes.
Classifications: Lifting accessories; lifting gear; rigging gear.
Classifications: Wire rope; steel wire rope.
Classifications: Exclusion zones; red zones; restricted access zones.
Classifications: Independent audit and verification.
Classifications: Operating and work procedures.
Classifications: Risk assessment; hazard assessment.
Classifications: Marine industry; shipping industry; maritime sector.
Classifications: Vessel; aboard ship; onboard vessel.
Summary
Crane's block and hook were ejected forward until they hit a stair railing, approx. 4 m forward of the sheave; they then fell approx. 3 m to the deck, and bounced before coming to rest
IMCA SF 04/23. Themes: crane and rigging, lifting operations, line of fire.