article_snippet: One possibility would be a total electrical failure which is very, very hard to imagine because (a plane has so many generators coming from different places," Tilmon said.
article_snippet: If they fail, there are other backups.
article_snippet: Something would be spotted, hopes rose, and then it didn't pan out.
article_snippet: Hopes were dashed; anguish returned.
highlights_snippet: Electrical failure is another theory .