Witnesses say they didn’t see or hear anything wrong, until the crash. The only survivor was conscious at the scene, but didn’t even realize he had been in an accident. Investigators say the circumstances that led to the crash of a small airplane after take-off, killing three, remain a mystery. Lawrence County Sheriff’s Lt. Brad Delay says the Piper twin-engine plane crashed shortly after take-off from the Aurora airport. The plane dove into a farmer’s field about a half-mile from the runway. A fourth person suffered serious injuries and has been hospitalized in Springfield. Delay says witnesses at the airport didn’t notice anything unusual, until the plane crashed. The survivor did talk to emergency personnel at the scene, before taken by ambulance to the hospital. But Delay says he didn’t even know he had been in a wreck. The plane was owned by an airport official, who said he had taken it out earlier before loaning it to a friend. He believes the friend was heading for Kentucky. Federal investigators have arrived on the scene. The plane smashed into a ball upon impact. A reporter at the scene says it no longer looks like a plane.