A customer in (b)(6) reported their thin prep 2000 processor is sucking fluid out of the vials and not creating a cell spot on the slide.Hologic field service engineer (fse) dispatched to customer site.Ts confirmed no patients needed to be recalled as a result of this incident.Fse confirmed and reproduced error.Found the following to be the most likely cause of the error: evacuation line clogged (cleaned all line and fittings) replaced the following parts as precautionary measure: waste tubing.Ran pneumatic test and blank sample.Processed samples to confirm operation.Instrument operational.Although no patients needed to be recalled as a result of this incident this is a reportable event since the instrument did not perform as intended.
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