Hughes Airwest Flight 706

Hughes Airwest Flight 706 was a regularly scheduled flight operated by American domestic airline Hughes Airwest, from Los Angeles, California, to Seattle, Washington, with several intermediate stops. On Sunday, June 6, 1971, the Douglas DC-9-31 serving the flight collided in mid-air with a McDonnell Douglas F-4 Phantom II of the United States Marine Corps over southern California, killing all passengers and crew on the DC-9.

Flight 706 had departed Los Angeles just after 6 pm en route to Seattle. The F-4 Phantom was arriving at Marine Corps Air Station El Toro near Irvine, California at the end of a flight from Naval Air Station Fallon in Nevada. The F-4 pilot and all 49 passengers and crew on board the civilian airliner perished in the collision over the San Gabriel Mountains, near Duarte, California. Only the RIO of the F-4 survived. The crash of Flight 706 prompted the United States Armed Forces to agree to both reduce the number of military aircraft operating under visual flight rules in civilian air corridors, and to require military aircraft to contact civilian air traffic controllers.

Wikipedia