On (b)(6) 2017, a philips field service engineer (fse) reported that during servicing of a philips big bore (bb) oncology ct system, the couch collapsed, descending downward.The fse confirmed that there was no harm to a patient, operator, or bystander as a result of this issue.The fse stated that the green safety bar was not utilized when raising the ct couch to perform service.The patient support repair and replace manual states: "warning: install the vertical safety support brace whenever personnel are working under the table.Failure to do so may result in personnel injury or death." the cause of the couch descending downward has been determined to be fse error.The fse did not follow the service instructions by not installing the green safety bar during servicing of the ct system involving raising the ct couch.
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