A Northwest flight going from San Francisco to Tokyo had to turn back to SFO yesterday afternoon after one of its engines stalled. Yikes. "The A330 Airbus took off from SFO around 1:30, but soon had problems with one of its two engines and was forced to turn around," reports KCBS. Thankfully, no one was injured. This comes on the heels of the Air France crash's black boxes being deemed unretrievable by U.S. Air Force authorities. (Aside: if black box recordings interest you, pick up a copy of . It's a fascinating read. Just be sure not to use for light reading while you're waiting for your plane to board.)