Safety Flash
Sheave became detached during lifting operations
Sheave became detached during lifting operations
- IMCA
- Safety Flash
- IMCA SF 15/23
- Crane and RiggingDropped ObjectsLifting OperationsManagement of Change
- Dropped objectsLine of fireMechanical failure
- Inspection and maintenanceLifting operations
- Lifting accessories
- Independent audit and verificationManagement of changeOperating and work proceduresPositive retention and reliable securing
- Marine industry
Summary
A sheave detached during recovery of marine geophysical sensors and fell approximately 6 m to the deck, with nobody underneath. The flash identifies installation, change-management and verification shortcomings, including removed secondary retention. Actions included replacing the swivel connection, adding securing arrangements and improving equipment records and written instructions.
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: Lifting accessories; lifting gear; rigging gear.
Classifications: Independent audit and verification.
Classifications: Management of change; MOC; change management.
Classifications: Operating and work procedures.
Classifications: Positive retention and reliable securing.
Classifications: Marine industry; shipping industry; maritime sector.
Summary
During recovery operations of marine geophysical sensors, a sheave parted from a swivel connection on the A-frame
IMCA SF 15/23. Themes: crane and rigging, dropped objects, lifting operations, management of change.