It’s amazing at how quick news agencies are to guess at the cause of aircraft crashes;even before the recovery of the black boxes. When the news reported the finding of what was believed to be wreckage, they said that the wreckage pattern that was found seemed to indicate that an attempted return was made. So the question is: Is it possible that the pilot attempted emergency transmission and got cut off by total electrical failure as the maintainence transmission indicated 
Already a long discussion going on here:
Lock it down…