Investigation Report
Riser Joint Dropped by Gantry Crane
04-11-2017 07:10 G25174 GC 627 Crane
- BSEE
- Investigation Report
- Unknown
- Dropped objectsMechanical failure
- Inspection and maintenanceLifting operations
- CraneLifting accessoriesOperator displays and control interfaces
- Exclusion zonesJob safety analysisOperating and work proceduresPositive retention and reliable securing
- Upstream oil and gas
- Vessel
Summary
An investigation examines a riser joint dropped by a gantry crane aboard Diamond Ocean Blackhornet. A proximity switch falsely indicated secure capture; powering down the console released the unsecured joint. Barricading prevented personnel exposure. The report describes mechanical locking safeguards, switch and software changes, and revised visual checks before lifting.
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: Lifting accessories; lifting gear; rigging gear.
Classifications: Operator displays and control interfaces.
Classifications: Exclusion zones; red zones; restricted access zones.
Classifications: Job safety analysis; JSA; job hazard analysis; JHA.
Classifications: Operating and work procedures.
Classifications: Positive retention and reliable securing.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Vessel; aboard ship; onboard vessel.