Fit for the 'Worst Case'.

The article discusses aerospace company Boeing Co. and the lithium-ion (Li-ion) battery design program for the firm's model 787 aircrafts as of April 2013, focusing on Chief 787 Engineer Mike Sinnett's assessment of a worst-case battery failure issue involving the Li-ion batteries. It states that all Boeing 787s that had been delivered since September 2011 have been grounded by the U.S. Federal Aviation Administration (FAA), Japan's Civil Aviation Bureau (JCAB), and several other national emergency airworthiness directives in the aftermath several battery-related fires in January 2013.