"I wouldn't say air crashes of passenger airliners are a thing of the past. They're simply a whole lot more rare than they used to be," says Todd Curtis, a former safety engineer with Boeing and director of the Airsafe.com Foundation.
Past decade has been safest for airline passengers →
Curtis said that the pilots could have taken the plane off autopilot and somehow went off course and didn't realize it until it was too late.
Why Malaysia Airlines jet might have disappeared? →