While watching tv news the announcers report that the plane suddenly lost altitude from 39000 ft to 4000 ft. ,but no one seems to know why the sudden decent. I am not a pilot and know nothing about aviation, but I recall from news of another aviation incident that a steep dive is a maneuver to restart the engines. None of the announcers say anything about that possibility. Any pilots here that know about that?
I apologize if this question is to far off topic or is considered ridiculous. Just thinking talented people hang out here and this is the only form I post on.