The affected handle and one of the two fastening screws were available for the examination.In the optical analysis, the remains of loctite were visible on the screw.The threads on both sides of the handle were partially torn out.Based on the available information, it was not possible to determine what caused the handle to come loose.The handle screws are tightened to a specified torque and secured with loctite according to the manufacturer's specifications.A slow loosening of the screws is recognizable during the equipment examination before use.The number of similar cases, related to the same root cause, is within the expected range of the respective risk assessment and thus accepted.
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