(b)(4) healthcare was notified by an authorized service center of a complaint involving an oxygen concentrator.The unit was sent to the service center for evaluation after the end user reported the unit line cord was "sparking." there was no report or evidence of illness, injury or medical treatment associated with the complaint.The service center returned the unit to (b)(4) for further investigation and root cause determination.Examination of the unit revealed evidence of physical damage, including broken screw bosses in the base and misalignment of the front cover.The line cord was damaged, as evidenced by abrasions and cuts at the point of the cord strain relief at the cabinet insert, which caused the internal wires of the cord to be visible.There was no evidence of electrical, thermal, or other damage to the inside of the unit.The line cord was replaced, and the unit operates to specification.
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