The U.S. Navy determined that the F/A-18D crash in Virginia was caused by a rare dual unrelated engine failure.
The pilots noticed a problem even before the jet was airborne, once in the air the right engine failed and the left engine could not produce enough power to keep the plane airborne.
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http://hamptonroads.com.nyud.net/2012/07/navy-jet-crash-caused-dual-engine-failure[/thumb]