(b)(4).Manufacturing site evaluation: one of the hard metal inlays of the received instrument was broken 2 mm from the tip.The solder is partially dissolved.Investigation was completed visually, using digital microscope keyence vhx-600.The breakage is user/maintenance related.The breakage appears to have resulted from a needle slipping off the needle holder.Aggressive maintenance methods can result in dissolving of the solder, causing the carbide metal to become brittle.Corrective/preventive action is not required.
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