On the (b)(6) 2022, the us customer reported inconsistent staining.Some slides were affected while other slides looked fine.The fse inspected the instrument and found that connection between syringe and stopcock is loose, but not leaking.The fse tightened the connection between syringe and stopcock.During repair, air bubbles were observed in tubing from stopcock to 3 psi valve.The fse purged air from line, planarized and leveled sink.The instrument was fully operational and available for the user.No harm or misdiagnosis was indicated.
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