The accident case
The fan failure of cooling water tower in a factory entered the maintenance operation. The original maintenance operation had been finished, and the maintenance personnel forgot a wrench in it. Returning to the fan again, the colleague who took over the shift saw that the fan of the cooling tower was not in working condition. The fan was repaired and ready for use in the succession log. Without confirmation, he started the button of the fan without authorization, and the maintenance personnel who entered the fan again would be hanged alive.
When do I need to Lockout tagout?
If a machine or equipment is likely to suddenly start or release dangerous energy, Lockout tagout is required when personnel need to enter the machine or equipment for related operations, the original safety interlock or protective cover is bypassed or dismantled.