Safety Flash
Main bell wire rope damaged
Main bell wire rope damaged
- IMCA
- Safety Flash
- IMCA SF 08/24
- Crane and RiggingDivingInspection and Maintenance
- Mechanical failure
- Inspection and maintenanceLifting operationsSaturation diving
- Diving bellWire rope
- Functional testingIndependent audit and verificationStop-work authority
Summary
During bell recovery after a saturation dive, a broken outer wire rope strand lifted a proximity switch bracket into the sheave, damaging the main bell wire. Operators stopped recovery and freed the bracket. The flash describes design shortcomings, sensor relocation, cutting back damaged wire, a witnessed load test and an empty-bell trial.
Classifications: Mechanical failure; equipment failure.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Lifting operations; load lifting; hoisting.
Classifications: Saturation diving; sat diving.
Classifications: Diving bell; closed bell; wet bell.
Classifications: Wire rope; steel wire rope.
Classifications: Functional testing; function test.
Classifications: Independent audit and verification.
Classifications: Stop-work authority; stop work; stop-work intervention.
Summary
A main bell wire was damaged by the proximity switch bracket being picked up by a single broken strand on the main bell wire rope.
IMCA SF 08/24. Themes: crane and rigging, diving, inspection and maintenance.