Field service rep evaluation: the field service engineer (fse) went on-site to evaluate the suspect device.The fse cycled the device on and was able to duplicate the reported device behavior.The fse performed a preventative maintenance on the device and replaced additional suspects assemblies.However, the issue was not resolved and due to the age of the device, the whole device was sent to our manufacture site for further evaluation.Result of investigation: the vyaire failure analysis group received the suspect device for an investigation.The fa group performed a visual inspection and found no anomalies.The investigation employed relevant empirical testing of the actual device suspected in the reported adverse event in order to establish their functional and other properties and to identify possible causes for the adverse event.Relevant testing would typically be based on test methods used for evaluating safety and performance as described in the latest relevant standards.However, no component failure was found therefore, no root cause can be established.
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