At first glance, a twin-engine aircraft looks a whole lot safer than a single-engine one. After all, if you lose an engine, you still have another to keep you flying in the air, right? This isn't ...

The crash of a UPS MD-11 freighter during takeoff from Louisville has rapidly shifted from a mystery to a focused hunt for answers inside the left engine and the hardware that held it to the wing.

The federal government is scrutinizing General Motors again, this time over reports of catastrophic engine failures in roughly 600,000 of its full-size trucks and SUVs. The new safety probe raises ...