That altimeter uses a radio beam to show the helicopter’s altitude above ground level, but it may not have been what the pilots of the helicopter were referencing at the time of the crash ...

That generation of Black Hawks typically has two types of altimeters: one relying on barometric ... The Washington collision was the deadliest plane crash in the U.S. since 2001, when a jet slammed ...

WASHINGTON — The crew of the Army helicopter that collided in midair with an American Airlines jet near Washington’s Ronald Reagan National Airport may have had inaccurate altitude readings in ...