Safety Flash
Parting of slings causing fall of heavy object onto seabed
Parting of slings causing fall of heavy object onto seabed
- IMCA
- Safety Flash
- IMCA SF 11/06
- Crane and RiggingDropped ObjectsLifting OperationsManagement of Change
- Dropped objectsMechanical failure
- Lifting operationsRigging
- Lifting accessories
- Management of change
- Marine industry
- SubseaVessel
Summary
Four incorrectly modified round slings failed during deployment of a 24 tonne metallic cover from a diving support vessel, dropping it onto the seabed without injury or damage. Hidden fibre knots and missing manufacturer certification were identified. Actions address approved suppliers, rigging testing and inspection, and documented management of change for exceptions.
Classifications: Dropped objects; falling objects; DROPS.
Classifications: Mechanical failure; equipment failure.
Classifications: Lifting operations; load lifting; hoisting.
Classifications: Rigging; slinging.
Classifications: Lifting accessories; lifting gear; rigging gear.
Classifications: Management of change; MOC; change management.
Classifications: Marine industry; shipping industry; maritime sector.
Classifications: Subsea; underwater worksite.
Classifications: Vessel; aboard ship; onboard vessel.
Summary
Modified and uncertified slings parted during subsea deployment, causing a heavy object to fall to the seabed.
IMCA SF 11/06. Themes: crane and rigging, dropped objects, lifting operations, management of change.