A single, used sample was received for investigation.The bag was charged with compressed air and leak tested under water; a leak was discovered from the right top corner of the bag.The area where the observed leak originated was examined, using a magnification inspection lamp, and a hole was verified in the film.The examination also revealed a film off-set issue in the perimeter weld at the port section of the bag.The offset is indicative of a film mis-alignment issue, which would have occurred during the manufacturing process.During the manufacturing process, the bag is placed into tooling for a welding process, which requires manual film alignment.As a result of the film misalignment observed on the returned sample, the manufacturing tooling likely placed stress on the film at the hole location and produced a tear, or weak area, in the film.
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