The returned blade was visually inspected under light-microscopy and no burrs or dullness on the blade was observed.The reported lot device history record was reviewed and it was confirmed that a temporary blanket deviation was initiated on the finished good lot.The knife that the customer prefers resumed usage in the pak builds beginning 4/22/19.Any paks built before this date will contain the temporary deviation knife.The substitute knife form, fit and function is the same previous knife.The root cause of the customer¿s dissatisfaction with the knife substitution is due to a temporary deviation which occurred due to a backorder with the supplier.During the back-order, a substitute knife was approved for use.Evaluation of the knife did not find any burrs or visual dullness on the blade.Quality engineering materials will notify the supplier of the complaint per procedure.Quality assurance will continue to monitor and take action for any future occurrences as is deemed necessary.Quality assurance has reviewed this complaint and will continue to monitor data for evidence of adverse trending and take further action, as appropriate.Quality engineering materials will be notified of this complaint through the monthly complaint review meeting.The manufacturer internal reference number is: (b)(4).
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