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.

The U.S. Army helicopter that collided with an passenger jet near Washington, D.C., had an advanced surveillance system turned off.

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.