NTSB: helicopter crew may not have heard key air traffic control transmission before DCA mid-air collision
National Transportation Safety Board officials said Friday that a key transmission from Reagan National Airport’s air traffic ...
Investigators cite possible miscommunication in D.C. midair collision which killed Massachusetts residents
The portion of the transmission that stated 'pass behind', may not have been received by the Black Hawk crew,” NTSB Chair Jennifer Homendy said.