Missteps, Equipment Problems and a Common but Risky Practice Led to a Fatal Crash

As they flew south along the Potomac River on the gusty night of Jan. 29, the crew aboard an Army Black Hawk helicopter attempted to execute a common aviation practice. It would play a role in ending their lives. Shortly after the Black Hawk passed over Washington’s most famous array of cherry trees, an air traffic controller at nearby Ronald Reagan National Airport alerted the crew to a regional passenger jet in its vicinity. The crew acknowledged seeing traffic nearby. One of the pilots then asked for permission to employ a practice called “visual separation.” That allows a pilot to...