Helicopter crew in collision with plane may not have heard key instruction from tower, NTSB says
The crew of the Army helicopter that collided in midair with an American Airlines jet near Washington, D.C.’s Ronald Reagan National Airport may have had inaccurate altitude readings in the moments ...
US probing 'bad data' possibly used by Black Hawk crew before deadly crash, official says
The National Transportation Safety Board is examining "bad data" the crew of an Army Black Hawk helicopter may have relied ...