Investigation summary: two pictures have been received for investigation.Upon visual inspection of both pictures received it can be observed the stopper is disassembled from plunger in a 20ml ll syringe.Dhr of lot 1711271 has been reviewed not finding any annotation or deviation regarding the alleged defect.Final products in this manufacturing line, for this reference and lot size are sampled and they are subjected to visual and functional inspections during the different manufacturing sub-processes according to procedures: visual inspection -molding: 2 injections per shift.-printing: 18 samples per two hours, after any intervention in the equipment and once at the beginning of the shift.-assembly: 18 samples per two hours, after any intervention in the equipment and once at the beginning of the shift.-primary packaging: 1 advance-step (without product) per two hours, after any intervention in the equipment, and once at the beginning of the shift.-secondary packaging: 1 shelf-package per pallet.Functional inspection -printing: once in the first pallet, once in the middle of the lot and once in last pallet of the lot.-assembly: once in the first pallet, once in the middle of the lot and once in last pallet of the lot.-primary packaging: once in the first pallet, once in the middle of the lot and once in last pallet of the lot.Investigation conclusion: although no issues were identified and manufacturing record stablished that all production and quality processes were carried out normally, we can confirm that the root cause of the non-conformance is related with a mechanical failure in assembly station.This defect has been produced due to a mechanical failure in assembly station during assembly process.Stopper can be wrongly assembled if assembly wheels for plunger-stopper assembly are not correctly aligned or if stopper is not correctly placed previous to assembly to the plunger rod.Since no incidence has been found during manufacturing process of this lot it cannot be determined which of the two options happened.The stopper was completely disassembled from plunger during use.
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