Cause of deadly DC crash investigated Investigators are looking for the cause of the fatal collision between a passenger plane and a helicopter near Washington DC, including claims that there was a staffing shortage at Reagan Airport at the time American Airlines Flight 5342 Bombardier CRJ700, 64 on board Length: 32 metres Sikorsky UH-60 Black Hawk Three on board Length: 19.8 metres (fuselage) FINAL MOMENTS 8:45pm (01:45GMT): Flight 5342 approaches Reagan Airport. Air traffic controllers ask crew to land on Runway 33, which pilots acknowledge 8:46pm: Helicopter’s pilot requests “visual separation”, meaning helicopter would take responsibility for maintaining safe distance from plane. Air traffic control approves request 8:47pm: Air traffic control asks helicopter if they have jet in sight and tells pilot to pass behind it. Helicopter crew responds “The aircraft is in sight” 8:48pm: Both aircraft collide and crash into Potomac River. All 67 people killed Potomac River WASHINGTON DC VIRGINIA MARYLAND Path of Army helicopter Path of American Airlines jet ROUTE 4 Collision 0.6 miles 1km Reagan National Airport White House 1 2 3 1 1 2 2 3 Route 4: Air corridor where helicopters are permitted to fly Black Hawk reportedly flying above 300 feet instead of below 200 feet as mandated at time of collision U.S. Sources: FlightRadar24, FAA, ADS-B Exchange, Reuters, NYT, OpenStreetmap © GRAPHIC NEWS