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.

Along with the error, officials found that the pilots “stepped on” some of the air traffic controller’s instructions, meaning they accidentally cut him off when pressing the

The report —which surrounds the Black Hawk helicopter’s collision with a passenger flight near Ronald Reagan Washington National Airport on Jan. 29, killing three soldiers and all 64 airline passengers and crew—asserts that Captain Rebecca Lobach failed to comply with an order to change course just seconds before the fateful disaster.