( NewsNation) — A United Airlines pilot issued a mayday call shortly after a plane carrying more than 200 passengers took off due to an engine failure.

Aireon sees a potential opportunity to assist the FAA in meeting some of its longer-term ATC modernization goals.

Aireon sees a potential opportunity to assist the FAA in meeting some of its longer-term ATC modernization goals.

The helicopter route at the time of the collision allowed the Black Hawk to fly as close as 75 feet below planes descending to land on runway 33 at Reagan National Airport, according to the NTSB.