Safety Flash
Crane accidents
Crane accidents
- IMCA
- Safety Flash
- IMCA SF 07/99
- Competence and TrainingCrane and RiggingInspection and MaintenanceLifting Operations
- Dropped objectsMechanical failure
- Inspection and maintenanceLifting operations
- CraneWinchWire rope
- Competence and trainingJob safety analysisOperating and work proceduresPreventive maintenance
Summary
Two crane accidents on a fixed installation involved uncontrolled boom descent during tank lifting and subsequent stowing. Investigation identified sun gear collapse, most likely caused by incorrect assembly, with a washer probably displaced during installation. Lessons emphasise trained maintenance personnel, clear gearbox work procedures and safe job analysis.
Classifications: Dropped objects; falling objects; DROPS.
Classifications: Mechanical failure; equipment failure.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Lifting operations; load lifting; hoisting.
Classifications: Crane; cranes.
Classifications: Winch; winches.
Classifications: Wire rope; steel wire rope.
Classifications: Competence and training; competency assurance; safety training.
Classifications: Job safety analysis; JSA; job hazard analysis; JHA.
Classifications: Operating and work procedures.
Classifications: Preventive maintenance; preventative maintenance; planned maintenance.
Summary
A crane boom descended uncontrollably after gearbox failure linked to incorrect assembly and inadequate maintenance controls.
IMCA SF 07/99. Themes: competence and training, crane and rigging, inspection and maintenance, lifting operations.