The National Transportation Safety Board is continuing to investigate a fatal midair crash at Ronald Reagan Washington National Airport that took place in January. Questioning and public hearings revealed malfunctions in air traffic control and instruments that may change understanding of how the tragic accident occurred.
The Black Hawk helicopter that crashed into an American Airlines passenger jet over the Potomac River had technical issues, showing pilots were flying 80 to 100 feet below their actual position in the crowded airspace above the river occupied by local police, military, and commercial jets, communication is key.
Helicopters were expected to stay in a range of between 100 and 200 feet above the Potomac. The Black Hawk was flying at 278 feet at the time of the crash, and sometimes climbed upward of 300 feet.
Read more at: https://www.yahoo.com/news/articles/evidence-deadly-american-airlines-crash-162302504.html?guccounter=1
