A lawsuit filed by a woman in U.S. District Court in Cheyenne, Wyo., this week claims negligence in a plane crash that killed a Minnesota pilot and the ex-couple's three sons in Wyoming in 2010, The Associated Press reports.
Michelle Bucklin -- whose ex-husband, Luke Bucklin, was piloting the plane -- claims in the suit that an air traffic controller's negligence at an airport in Jackson Hole caused the crash, The AP reports. She is suing Virginia-based Serco, Inc., which owns the air traffic control service.
The lawsuit stated that the plane "was piloting at too low an altitude, as allowed by Serco, was sucked from the sky and violently collided with a mountain."
Luke Bucklin, 41, twins Nate and Nick, 14, and Noah, 12, all died when the plane Luke Bucklin was flying crashed in Wyoming's rugged Wind River Range.
A National Transportation Safety Board investigation concluded Luke Bucklin's decision to fly a heavily-loaded plane over the mountains in snowy weather was probably the cause of the crash; but added that an air traffic controller's improper flight clearance and Bucklin's acceptance of it was a contributing factor, The AP says.