Air shock in Washington: these are the factors that would have contributed

Flying helicopters near Ronald Reagan National Airport always carries some risk. However, the conditions of the moonless night on January 29, when a Black Hawk helicopter from the army and a passenger plane from American Airlines collided, were unusually difficult.

Many of the factors that contributed to the catastrophe are still being discovered, while the researchers of the National Transportation Board try to rebuild the collision in which 67 people died. The shock clash, which made the remains of both aircraft fall to the ice cream Potomac River, was the most deadly aviation accident in the United States since 2009.

The researchers have said that the helicopter flew about 30 meters above the height authorized in its designated part of airspace, and are trying to determine why.

But interviews with helicopter pilots suggest that Black Hawk also faced a series of complex flight conditions; Some typical of the bustling area surrounding the National Airport, on the outskirts of Washington, and other exclusive of the series of events last Wednesday. And the crew pilot an old model that lacked certain security technologies in its cabin that are common in those of commercial airplanes in the United States.

“Give I was in the service.