(b)(4): the device was returned for evaluation.The analyst found the fixed jaw is broken.The fragment has not been returned.A corroded area is visible on the breakage zone.This corrosion is probably anterior to the breakage observed.Considering the age of the instrument (almost 10 years) and the observation of a corroded area anterior to the breakage, the most probable cause is a progressive weakening of the jaw during the life of the instrument (uses / constraints / shocks) which has led to the creation of micro-cracks until the reported breakage.Result ¿ fatigue problem.(b)(4).
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