On 30-apr-2018, the ge field engineer (fe) was troubleshooting collimator blade misalignment on a definium 8000 system at (b)(6) hospital in the usa when he noticed the collimator mounting screws were partially backed out.The customer informed the ge fe that the collimator was recently replaced by a philips service representative.To correct this issue, the ge fe replaced the collimator per the service manual instructions and recalibrated the positioner.The collimator did not detach and fall and there was no injury related to this event.
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Ge healthcare¿s root cause investigation has been completed and the cause of this incorrectly mounted collimator was determined to be a service error.The ge field engineer (fe) stated he was originally notified by the customer the collimator was misaligned.The fe also stated this site is normally serviced by a third-party service provider, but they could not correct the misalignment and therefore the customer contacted ge service.The customer also informed ge the third-party service provider recently removed the collimator due to an unrelated service activity.When the ge fe arrived at the site for troubleshooting, he observed the siemens collimator was mounted incorrectly as the detent arm was under the mounting ring and the three mounting screws were protruding out from their holes which are both obvious signs of incorrect installation.To correct this issue, he replaced the collimator according to the service manual instructions and re-calibrated the system positioner calibrations.The third-party service provider was contacted, but they would not supply any additional information regarding this event.No further actions are needed.
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