It is likely the Black Hawk pilots “stepped on” the communication for less than a second by pressing the microphone key to communicate back to the control tower, she said.

Voice recordings from the Black Hawk helicopter involved in the crash with a commuter plan in Washington, DC, on January 29 have been released by the NTSB in a briefing for reporters Friday.

Investigators suspect the Army helicopter crew that collided with an American Airlines jet near Washington, D.C., might have had inaccurate altitude readings and missed key air traffic controller instructions.