Investigators probing the January midair collision of a passenger plane and an Army helicopter over Washington that killed 67 people found the chopper was flying higher than it should have been and… ...

Three days of investigative hearings on the deadly midair collision over Washington in January began Wednesday aiming to reveal new insights into what caused the crash.

Investigators have found that a helicopter involved in a deadly crash with a passenger plane over Washington was flying above its height limit.

NTSB finds Army chopper in fatal midair crash with plane was above altitude limit The helicopter's altitude-measuring instrument was also inaccurate.