Worker was working outside of aerial work platform.
He remained tied off to the platform basket.
The ground crew started to retract the boom and basket without warning.
Other personnel noticed and the operation was stopped in time.
No one was injured, but it could have caused serious, life-changing injury.
Why did it happen?
Worker was still attached to the basket while working outside the platform.
The ground crew were unaware of the worker’s position or status when they began lowering the basket.
What did they learn?
Comply with tie-off requirements in working at heights procedure.
Ground crew should not operate aerial work platform controls except in emergencies.
Ground crew should consider location and status of personnel using aerial platforms.
Inspect telescopic arm and basket before operating.
Include aerial work platforms safety requirements in safety plans.
Everyone should follow the training and equipment allocation process.
Ask yourself or your crew
What other actions could have been taken?
How can something like this happen here?
What are the correct tying off actions?
How do we verify the status and position of the basket and arm before operating?
How would you intervene in this, or a similar, situation?
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Worker was working outside of aerial work platform. He remained tied off to the platform basket. The ground crew started to retract the boom and basket without warning.