Safety investigators probing January’s midair collision between an American Airlines Group Inc. regional jet and a US Army Black Hawk near Washington found a key instrument on the helicopter was displaying inaccurate altitude data that could have led the pilots to think they were flying lower than they actually were.

In May, the FAA barred the Army from helicopter flights around the Pentagon after a May 1 close call that forced two civilian planes to abort landings. The FAA this week said the

The National Transportation Safety Board will hold three days of hearings on the fatal midair collision between a passenger jet and an Army helicopter

The hearing opened Wednesday with a video animation showing where the helicopter and airliner were leading up to the crash.

January 29 mid-air collision between passenger jet and Black Hawk helicopter near Reagan National Airport in Washington, D.C. left 67 dead

The National Transportation Safety Board (NTSB) began a three day hearing in Washington, D.C., to investigate the midair collision between a U.S. Army Black Hawk helicopter and a commercial regional jet that killed 67 people in January.