Safety Flash
Crane whip line parted during hook stop testing
Crane whip line parted during hook stop testing
- IMCA
- Safety Flash
- IMCA SF 05/21
- Crane and RiggingInspection and MaintenanceLifting OperationsManagement of Change
- CorrosionDropped objectsMechanical failure
- Inspection and maintenance
- CraneWinchWire rope
- Functional testingManagement of changeNon-destructive testingRisk assessment
- Vessel
Summary
During auxiliary winch hook-stop testing, uncontrolled hoisting caused a headache ball to strike the crane jib, snap the wire and fall with the rigging to deck. Corroded speed encoders and poor wire condition were identified. The flash addresses rope examination, encoder maintenance, management of change and start-up risk assessment.
Classifications: Corrosion; corrosion damage.
Classifications: Dropped objects; falling objects; DROPS.
Classifications: Mechanical failure; equipment failure.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Crane; cranes.
Classifications: Winch; winches.
Classifications: Wire rope; steel wire rope.
Classifications: Functional testing; function test.
Classifications: Management of change; MOC; change management.
Classifications: Non-destructive testing; NDT; non-destructive examination; NDE.
Classifications: Risk assessment; hazard assessment.
Classifications: Vessel; aboard ship; onboard vessel.
Summary
The crane was positioned in the rest while the Crane Operator carried out hook stop testing of the auxiliary winch; an uncontrolled hoisting movement resulted in the headache ball striking the jib and falling with the hook stop rigging assembly back to deck
IMCA SF 05/21. Themes: crane and rigging, inspection and maintenance, lifting operations, management of change.