The Army helicopter that collided with a passenger jet last week in Washington had its tracking technology turned off at the time of the crash, U.S. Senator Ted Cruz told the New York Times.

Technology that would have allowed air traffic controllers to better track the movement of an Army helicopter was turned off at the time of the crash, Sen. Ted Cruz, R-Texas, said in an interview Thursday.

Flight data posted online appears to show another Army helicopter flying higher than the maximum altitude allowed around Ronald Reagan Washington National Airport in Washington, D.C., before last week’s fatal collision between a Black Hawk helicopter and a passenger plane.