Safety Flash
Main Crane failure during load test
Main Crane failure during load test
- IMCA
- Safety Flash
- IMCA SF 21/24
- Crane and RiggingInspection and MaintenanceLifting OperationsMachinery and Equipment
- Dropped objectsLoss of vessel stabilityMechanical failure
- Inspection and maintenanceLifting operations
- CraneWire rope
- Functional testingOperating and work proceduresPreventive maintenance
- Vessel
Summary
An offshore crane overload test ended with broken main-block wires and two cargo barges falling into the water. Uneven drum torque followed clutch-pad slipping, linked to inadequate burnishing of new pads. The vessel listed approximately nine degrees; nobody was injured. Lessons cover burnishing, torque testing, planned maintenance and crane FMEA review.
Classifications: Dropped objects; falling objects; DROPS.
Classifications: Loss of vessel stability; capsize; vessel stability.
Classifications: Mechanical failure; equipment failure.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Lifting operations; load lifting; hoisting.
Classifications: Crane; cranes.
Classifications: Wire rope; steel wire rope.
Classifications: Functional testing; function test.
Classifications: Operating and work procedures.
Classifications: Preventive maintenance; preventative maintenance; planned maintenance.
Classifications: Vessel; aboard ship; onboard vessel.
Summary
At maximum load, the crane main block wires broke and the testing load fell, along with the main block, into the water.
IMCA SF 21/24. Themes: crane and rigging, inspection and maintenance, lifting operations, machinery and equipment.