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The suspected product was returned for analysis.The event history log was not reviewed, as the unit was not serviced during the relevant period.A visual inspection was conducted.The customer-reported issue of a failed air-in-line (ail) test was verified and further confirmed through the air detector test.The aild was replaced, followed by a successful air detector test, dso/uso sensor calibration, and additional performance checks.The unit met all testing criteria.Further inspection identified additional issues, including a rusted battery door, a buckled uso seal, a delaminated dso seal, and a scratched lens.The uso seal, dso seal, battery door, and lens were replaced.Subsequently, dso/uso sensor calibration and product verification testing (pvt) were performed.The unit successfully passed all testing criteria.
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