IMCA experiences an incident the place an AC vent unit cowl dislodged.
What occurred
On a pipelay tower, the AC cowl of a capstan electrical cupboard turned indifferent and fell roughly 1.7 meters. The quilt was discovered resting on a cable hooked up to the platform and diagonal tubular brace. There have been no accidents. Nevertheless, there was a possible danger to people working close by. Our member, primarily based on data from the business “DROPS calculator”, has handled the incident because it if had been a Misplaced Time Harm (LTI).
Crew had been working within the pipelay tower once they heard an unknown noise. They stopped to analyze the supply of the noise and located that an AC unit vent cowl had develop into indifferent from the capstan winch PLC cupboard.
Work was stopped instantly underneath “Cease Work Authority”. The integrity and rivets of the remaining air-con models on the tower had been inspected, together with a safety evaluation of the remaining covers. It was additionally confirmed that there was no harm to {the electrical} cable the quilt contacted.
What went improper
Preliminary investigations detected a failure of the securing rivets attributable to galvanic corrosion. When aluminium and chrome steel are mixed in an meeting, electrons from the aluminium migrate into the chrome steel inflicting the aluminium to weaken and deteriorate at an accelerated fee.
Actions
There’s potential for the same incident to happen on related vessels.
Examine all related cupboards / gear and alter out any incompatible fixings;
Overview current dropped object checklists and/or work orders and replace as required;
Confirm throughout routine dropped object inspections of apparatus at peak, that main and secondary fixings and security securing lanyards are all appropriate;
Replace Deliberate Upkeep work orders the place required.
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Supply: IMCA
