The National Transportation Safety Board said the plane involved in a fatal crash with a Black Hawk helicopter was trying to increase its altitude just before the crash.

Preliminary analysis of voice recordings and other black box data recovered from the crash site showed the helicopter pilot ...

The Black Hawk helicopter may have been flying with “bad data” and didn’t hear all air traffic control instructions before ...

Investigators believe the Army helicopter crew involved in the midair collision near Washington, DC may have had inaccurate altitude readings and missed key air traffic control directions.

Transportation safety officials said they believe the crew of an Army Black Hawk helicopter that crashed into a passenger jet ...

The NTSB said Army Black Hawk crew may not have heard a message to "pass behind" the D.C.-bound passenger plane before the ...

Officials with the National Transportation Safety Board are expected to give an update on their investigation into the D.C. plane crash last month.

Last month, an American Airlines passenger jet and an Army helicopter collided as the plane prepared to land at Washington D ...