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H.6.Investigation summary: twenty-nine sealed assembled 21g 1ml tb syringes were received, confirmed to be from batch # 7087642 (p/n 309624).The samples were visually evaluated.Package cavity: 05, 06.One side of the package was not completely cut, the bottom web was not cut thoroughly, and a piece of the bottom web was still connected between 2 syringe packages.Total 14 groups of connected syringes were found, 2 syringes as a group.One package was found without connection to the other package.The syringes were also found to have opened seal at the improper cut bottom web.A device history record review showed no rejected inspections or quality issues during the production of the provided lot number that could have contributed to the reported defect.In-process inspections are conducted at different points within our manufacturing process to ensure our products meet product specification along with acceptance quality limit (aql) requirements.20 pieces are visually inspected every hour at the packaging process to confirm product quality.A complaint history check for lot 7087642 was performed, this is the first complaint received for open seal.Investigation conclusion: several potential failure modes at the cutting station were identified during root causes analysis performed with subject matter experts.These include, worn crosscut springs located at the bottom and top could cause incomplete/rough knife cuts in packages, worn cylinder block could cause incomplete/rough knife cuts in packages, worn cut guide could cause incomplete/rough knife cuts in packages, and worn blades could cause incomplete/rough knife cuts.Preventive maintenance activities for the crosscut springs, the cylinder block, and the cut guide were added to the 6 weeks plan of the packaging machines.Also, a study is being performed to understand the performance of the blades used in the cutting station.This study will helps us to define replacement frequency based on lifetime.
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