(b)(4).Batch #unk.Investigation summary: the device was received with the coating material of the housing flaking off.Based on prior investigations, the loose particles on the surface are likely aluminum oxide from the base material.It was connected to a generator, evaluated with a test instrument, and was found to be functional.The instrument was disassembled to inspect the internal components and the moisture indicator was positive.Analysis was unable to determine the exact root cause that lead to crack in the hand piece nose cone.The lot/batch was not provided; therefore, the manufacturing records evaluation could not be performed.It is possible that the ingress of moisture affected hand piece functionality.Additional information was requested and the following was received: did the patient experience any adverse consequences due to this issue? no patient consequences.
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