At the end of an annual service day in a wind turbine nacelle, a worker packed up equipment and loaded it into certified lifting bags.
The bags were loaded onto the nacelle crane hook for lowering to the transition piece.
During the operation, two of the lifting bags became detached from the crane hook and fell 60 meters (196 feet) into the sea.
Both of the bags were recovered from the sea, there were no injuries or property damage.
Why did it happen?
The safety latch on the lifting hook failed.
The hook was potentially loaded incorrectly, which would have resulted in excess pressure on the safety latch of the crane hook.
What did they learn?
Ensure any planned lifting operations are verified to ensure safe loading techniques are used.
Deliver a toolbox talk to all workers, to include:
- The correct procedure for rigging a nacelle crane.
- Dangers of incorrect loading.
Ask yourself or your crew
How can something like this happen here?
What is the correct way of rigging up a load?
How can you test that a load is rigged up correctly?
What are the potential ways that a load can drop during a lifting operation?
What can the consequences be?
What else can we do to manage the risks?
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A worker packed up equipment and loaded it into certified lifting bags for lowering via a crane. During the operation two of the lifting bags fell 60m to the sea. Original material courtesy of IMCA