(b)(4).The mri kit was returned for evaluation.A visual exam was performed and it was observed that the mac 2 blade was missing.The complaint was reported as the mac 2 blade would not energize when engaged on the handle.The mac 2 blade was not present in the kit; however, during functional testing of all of the returned blades, it was found that two of the blades would not energize: the mac 3, and the mil 1.The small incandescent bulbs which are seated in the focs light bundle were either defective or burned out.Based on the investigation performed, the reported complaint was confirmed.It should be noted that the blade that was reported defective was not returned, but there were defective blades in the kit.The root cause as to why the bulbs burned out could not be determined.A conclusion code could not be found as the complaint was confirmed, however, a root cause was not established.
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