The New York Times in a report said that the military helicopter that collided with an American Airlines regional jet on Wednesday night appeared to have been flying too high and outside its approved flight path at the time of the crash.
Citing sources, the report said that the Army Black Hawk helicopter was meant to fly at a lower altitude and in a different area while navigating the congested airspace around Reagan National Airport.
Before a helicopter can enter any busy commercial airspace, it must get the approval of an air traffic controller. In this case, the pilot of the helicopter asked the air traffic controller for permission to use a specific, predetermined route that lets helicopters fly no higher than 200 feet and that hugs the bank on the east side of the Potomac River, a location that would have let it avoid the American Airlines plane, The New York Times reported.
The requested route, known as Route 4 at Reagan, was a route familiar to both the air traffic controller and the helicopter pilot. The pilot visually identified the American Airlines plane, and the controller directed the helicopter to follow the assigned route and stay behind the aircraft.