Exclusive: MH370 Was Crippled by Sudden Electrical Failure - The Daily Beast
'This new revelation of a serious technical problem and its immediate effects is buried in the arcane detail of a lengthy report (PDF) issued last week by the Australian Transport Bureau who are directing the search for the Boeing 777. It is the first official acknowledgement of what had previously been only speculation—that there was a sudden loss of electrical power capable of disabling vital systems.'
'The purpose of the report was to reinforce confidence that the undersea search for the airplane is being carried out in the right part of the Indian Ocean and has a high chance of success.'