A SIA A330-300 with 194 people on board plummeted 4,000m while flying from Singapore to Shangai. 13000ft For the old folk!

During bad weather, both Rolls Royce engines stopped working, and the plane quickly dropped to below 20,000ft from its crusing altitude, before the pilots got the engines fired up again.

This sounds like they flamed out due to the amount of water they sucked in. This is not supposed to happen with the modern engine designs.