A ‘New York Times’ investigation into the Jan. 29 midair collision between an American Airlines passenger jet and a U.S. Army Black Hawk helicopter found that the captain who was flying the military aircraft was not suffering from any medical impairment.

The pilot of the Black Hawk helicopter, which collided with an American Airlines passenger airplane in Washington DC, did not comply with directions to change course seconds before the crash. The helicopter collided with an American Airlines passenger plane in a fatal incident.

Black Hawk pilot Rebecca Lobach failed to follow her flight instructor in the moments before colliding with a civilian airliner over Washington, D.C., according to a new report.