With any new thing, there is usually a bathtub curve of corrective maintenenance. The initial design is also much the same way.
It happened with some frightening engine problems in the A380 Super Jumbo jet. Such discoveries are to be expected. If flying scares you, then adjust your expectations accordingly. Just remember that even a very well designed, time tested aircraft can still be destroyed by a brief moment of inattention by the pilot, as evidenced by the unfortunate 777 crash at San Francisco airport recently.
Researchers at Lawrence Livermore National Laboratory have published two physics-based models for the selective laser melting (SLM) metals additive manufacturing process, so engineers can understand how it works at the powder and scales, and develop better parts with less trial and error.
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