Lemme guess ...
I'm going to go way out on a limb here and say it was another gift to humanity from the "Religion of Peace".
By my recollection over the last ten years, the "Religion of Peace" has caused a lot more plane crashes than mechanical failures have caused.
It used to be when a plane crashed, you worked from the assumption that the most probable cause was pilot error, followed by mechanical failure, and finally by malicious intent. Nowadays, the ROPers have stood these assumptions on their head, and one should presume that Islamakazi a$$holes are responsible for any plane crash until proven otherwise.
IMO the questions should be: How many members of the "religion of Peace" have become mechanics and caused the mehanical failures?
Guess all you want. It was a mechanical error. I know 'conservatives' seemingly want to lay every plane crash at the feet of radicals, but a plane crash can just be a plane crash without Islamic 'conspiracies' you know.