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The problems with this plane, which forced FAA to ground all of them today in US, is its new type of lithium-ion battery made in Japan, and never used in a plane before. This type of powerful battery is overheating easily, catches fire etc. resulting in a number of emergency landings over a short period of time. Now I have a few questions: 1) Aren't these batteries (like pretty much any product that you can purchase, such as car or laptop battery) going through extensive quality control testing, using sound statistical techniques to make sure that faulty batteries, or risk of failure over the lifetime of the product, is below an acceptable threshold, say below 0.001%? Read all my questions at http://www.analyticbridge.com/forum/topics/boeing-s-dreamliner-turns-into-a-nightmare-due-to-bad-analytics You may leave the list at any time by sending the command SIGNOFF allstat to [log in to unmask], leaving the subject line blank.