On May 7 , 1964 Pacific Air Lines Flight 773 crashed near San Ramon , California . All 44 aboard the Fairchild F-27 were killed when the aircraft dove into a hillside near vertically . Investigators found a gun in the wreckage , and the FBI determined that a suicidal passenger shot both of the pilots , and then himself , causing the plane to dive out of control . This scenario was repeated many years later at another California-based airline , Pacific Southwest Airlines , when a former employee shot both pilots on board a BAe 146-200 Pacific Southwest Airlines Flight 1771 en route from Los Angeles to San Francisco , causing it to crash in the hills of San Luis Obispo County with the loss of all on board
Pacific Southwest Airlines Flight 1771
Pacific Southwest Airlines Flight 1771
Pacific Air Lines