Senator Ted Cruz, the chairman of the committee with oversight of transportation, said there was no compelling reason for the technology not to have been in use when the helicopter collided with a commercial jet over the Potomac River.

Officials at the National Transportation Safety Board said they are looking into the possibility that bad data caused inaccurate readings for the Black Hawk helicopter pilots in the January D.C. crash.

Official tells reporters that recording from Black Hawk helicopter suggests incomplete radio transmission might have left crew without an understanding of how it should shift position