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(b)(4).Date sent: 3/26/2025.D4 batch #: x95c3t.Investigation summary: the product was returned for evaluation.Visual inspection and functional testing were conducted on the returned device.Visual analysis of the returned sample revealed that the device was returned with no apparent damage.It was connected to a generator, evaluated with a test instrument and resulted in "reactivate two switch activations detected" alert screen displayed by the generator.No communication issues were observed at any time during the testing.The instrument was disassembled to perform an internal electrical test that revealed a hand activation to ground short circuit condition at the cable level, affecting the functionality of the handpiece.In addition, there was moisture present.The handpiece has a number of seals to prevent fluids from entering the housing.¿moisture present¿ describes a condition where water enters the handpiece cavity during the steam sterilization process.The primary path of ingress is the distal seal, this may be caused by a reduction of the compressive force on the distal seal.However, no definitive root cause could be drawn.The manufacturing records were reviewed and the manufacturing/packaging criteria were met prior to the release of this batch.It is probable that the ingress of moisture affected handpiece functionality.A manufacturing record evaluation was performed for the finished device batch number, and no non-conformances were identified.As part of the quality process all devices are manufactured, inspected, and released to approved specifications.No conclusion could be reached as to what could have caused this issue.This report is being submitted pursuant to the provisions of 21 cfr, part 803.This report may be based on information which has not been investigated or verified prior to the required reporting date.This report does not reflect a conclusion by ethicon, or its employees that the report constitutes an admission that the product, ethicon, or its employees caused or contributed to the potential event described in this report.If information is obtained that was not available for the initial report, a follow-up report will be filed as appropriate.
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