(b)(4).On 2019-04-24 a maquet field service technician (fst) was on site and investigated the unit in question.The fst could confirm that the device pcb was damaged due to a leaky flow sensor (old type) which dripped water on the pcb.The data is also being handled through a designated maquet cardiopulmonary trending and applicable investigation process.Due to this no further investigation initiations will be completed at this time.According to the service report (b)(4) dated 2019-04-24: unit reported to smell like smoke and spark during a case.Unit was swapped and case was finished.Completed fsca 2018-11-19.Leak was coming from connection of old style flow sensor and cardio wet end kit, replaced wet end kit, this leak had dripped onto the device board causing a short and the smoke smell.Device pcb badly damaged.Replaced device pcb.Unit was due for servicing.Replaced filter mat and uv lamp with pass through system.Leak test was completed - no leaks detected.Completed inspection.Visual check - pass.Electrical safety - pass.Function tests - pass.Measured value and alarm monitoring - pass.Passed all functional tests.Since the reported failure did not contribute to a death or serious injury no corrective action is needed.In addition at this time it cannot be concluded that this is a systemic error.No corrective action is needed.
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