Ref.Id: (b)(4).The local field service engineer (fse) went on site and found shocks recorded on the affected detector.The detector needs to be replaced.He returned to the site and installed and calibrated a new detector.Finally, the system meets the specification for the performed service and is returned to use.No details were provided about the circumstances when the detector fell down.As the customer did not make other claims, it is concluded that the detector was dropped by accident (use error).Risk estimation revealed acceptable risk per risk benefit analysis, because actually, there is no feasible technical solution for this kind of ¿use error¿.This issue is further monitored and trended.
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